Have recently purchased an xbox and the controller has connected to it once for about 10mins, i press the connect button on the xbox wait til the lights goes round and then press the controller connection , once i hit the button they both flash all four lights at me then xbox stops flashing and controller continues to flash, please help lol Thanks Al

I would like you to power cycle your network equipment, once more, as suggested up front and, also, clear the Xbox system cache 3 times in a row. Here we go!
Power off your network equipment (modem and router) for 5 minutes. Power on the modem and wait one minute for it to connect properly. Power on the router and wait another minute. Power on the Xbox and go to Xbox network settings. Select Configure Network and slide to the Additional Settings tab. Select Restore network settings to factory defaults. If wireless, reconfigure Xbox wireless settings. If wired, Press "B" on your controller and select Test Xbox LIVE Connection.

Clear Xbox system cache

1. Press the Guide button on your controller, go to Settings, and select System Settings.
2. Select Storage or Memory.
3. Highlight any storage device, and then press Y on your controller.
4. Select Clear System Cache.
5. Clear your Xbox system cache 3 times in row.

Restart your console.

Try download your profile from LIVE.

It sounds like your new controller needs to be "sync'ed" (synchronized) to your console so that the console recognizes the controller. Turn on console with controller. Then press sync button on front of controller (small button) and then within 20 seconds press little sync button on front of controller (not the top, its the forward part facing console, little button)

1 Disconnect all accessories and wired controllers from the Xbox 360.
2 Hold the "Guide" button down for three seconds on any wireless controllers, then respond to the prompt on your television screen to disconnect the controllers from your system.3 turn on the wireless headset by pressing the "Power" button in the center of the earpiece. 4 Press the "Connect" button on the front of your Xbox 360 system. 5 Press the "Connect" button on the wireless headset. The ring of lights around the power button of the Xbox 360 system should spin and blink once. One of the lights should remain lit up, indicating the port number that the headset is using. If you do not see any lights on the system, you may have a faulty wireless headset.6 Press the "Guide" button on your wireless controller to reconnect the controller to the Xbox 360 system. If you are using a wired controller, you can plug it back into the system.7 Press the "Connect" button on the top of your wireless controller to sync the controller with your system. You should see the connection light around the "Guide" button on the controller light up, indicating which port you are connected to. You should also see a corresponding port light in the ring around the power button of your Xbox 360 system 8 Press the "Connect" button on the wireless headset until the port light on the headset matches the light on the controller and Xbox 360 system. For example, if you are the first player, the light for port number one should be lit up on the Xbox system, the controller and the headset. When all lights correspond, your headset should be properly connected.

It's possible the xbox 360 controller isn't connected to the xbox 360. Turn the xbox 360 on by pressing the power button, and wait until it reaches the dash board. Then press the controller syncing button on the xbox 360 itself and wait until the xbox 360's ring lights start to spin around. Then press and hold the synch button on the controller (located near the charge port) and the controller should synch up with the xbox 360.

It will connect or will not? It sounds like it won't, if it won't try holding down the sync button on the console for thirty seconds, press the sync button on the controller during this time. If that doesn't cause it to sync the controller is defective.

press the little white button on your 360 on the front and then press a button on top of your controller that looks the same, then wait a bit and it

turn on the console. let it start up all the way. turn on the controller. on the console to the right side of the two memory card slots is a little button. press and hold it til the green lights start flashing around the power button. there is a little button on top of the controller. when the lights around the power button are flashing, press and hold the button on the top of the controller til the lights around the center button start flashing and then it should sync together

it sounds like your controller keeps losing sync with the 360.

- turn them both off
- turn on the 360 with the power button on the console
- wait for it to start up, then press the sync button next to the usb flap on front.
- then press the sync button on the controller (by the recharge connection slot)

That should reset it.

Turn Your Console and Controller On The Xbox® Guide button in the center of your controller puts the Xbox 360® experience at your fingertips. Press and hold the Xbox Guide button to turn your console on.
To turn on your console only, press the power button on your console. To turn on your controller only, press the Start button on your controller.
Once on, pressing the Xbox Guide button gives you immediate access to the Xbox Guide. To turn off your console, press and hold the Xbox Guide button for three seconds and then confirm your selection.
Turn Your Console and Controller Off To turn your console and controller off, press and hold the Xbox Guide button on your controller for three seconds. Then select whether you want to turn off just your controller or both your controller and your console. (Selecting the console will turn off both the console and all connected controllers.)
To turn off one controller when multiple wireless controllers are connected, press and hold for three seconds the Xbox Guide button of the controller you want to turn off, then select Turn Off Controller.
To turn off your console only, press the power button on your console
When you connect a controller to your console, it is assigned a specific quadrant, which glows green to indicate the controller's number and position. Each subsequent controller connected to the console (up to four) is assigned an additional quadrant.
If system problems should arise, the Ring of Light on the console will flash combinations of red.

I hope this solved your problem.
Happy Gaming!

Try this:
Under heading "How can I change the screen positions for my wireless controllers?"
http://www.xbox.com/en-US/support/systemuse/xbox360/resources/supportfaq.htm

To reset the screen configuration for an Xbox 360 Wireless Controller:

1. Turn off your Xbox 360 console and any connected Xbox 360 wireless controllers.
   
   (To turn off your wireless controller, power down the system and wait for the lights around the controller's Xbox Guide button to disappear.)
2. Manually turn on your Xbox 360—don't use your controller's Xbox Guide button.
3. Press the connect button on the front of your console. This is the small button just to the right of (or below, if your console is on its side) the port for Memory Unit B. The lights around the console's power button will flash as the console searches for a wireless controller.
4. Press and hold the Xbox Guide button to turn on the wireless controller that you want to assign to slot one.
5. Once the controller is on and the lights are still circling the power button on the console, press your controller's connect button, located just to the right of the charge port.
   
   When the lights on your controller stop spinning, the wireless controller is configured to slot one and the upper-left quadrant light will glow.
6. Select the controller you want in slot two and repeat steps 4 and 5. You can configure up to four wireless controllers.