I'm trying to connect it to my wireless router and it's not connecting

Are you trying to :
1) Connect the second Wireless Router to the internet as well?

2) Connect the second Wireless Router to the existing Wireless Router which is already connected to the internet

PS3 is not finding your router.
Make sure you choose wireless network under network settings and choose scan for wireless network.
Make sure SSID on router is broadcasting and not hidden.
Make sure router is broadcasting in G or MIXED mode.
Try removing wireless security on the router (open mode) and testing to see if connection can be made.
If connection can be made without security then try with security on.
Place ps3 closer to the router or connect with ethernet cable to verify connectivity.
Verifiy router is working by connecting a laptop or other device to the internet/router.

what's the error? if your getting the error Connected with limited connectivity try checking your network key in the router and the wireless settings on your computer if they are correct or just removed your security key, if your getting an error no networks in range or no network available check the router settings if the wireless signal is turned on the router, if you get an error windows could not connect to wireless networks try uninstalling and reinstalling the wireless card driver on your system and set the the router to defaults then try connecting with out changing any settings in the router to see if it will connect, if it connects, then there was/were settings in the router and possibly in the wireless settings in your laptop that was causing the computer and the router to have communication issues, also check for possible applications such as network magic that could cause a wireless signal to degrade or not allow connections at all if such application exists on your system uninstall it Microsoft or windows has its own wireless configuration software built into handle wireless connections in XP it is wireless zero configuration in vista and in win7 WLAN which can be set in network and sharing connection in the control panel window.....

2 wireless laptops are connecting. that means the router must be working properly. Only 1 laptop is not connecting.
Try to change the wireless channel on the router.
For this you will need to open the set up page of the router.
Is there any computer connected to the router ? If not then you will need to connect the computer to the router and open the set up page. Under wireless settings try to change the wireless channel on the router and see if that works.

Is there any computer connected to the router ?
If not then connect the computer to the router. If you are connecting a wireless computer then disable the wireless connection on the computer. open the set up page of the router. change the wireless network name to something different that you never used before. change the standard channel to 11. save the settings. Try to connect to the wireless network. Check if you see the new network name ? If you see the new then try t connect and see if that works.
This router WRT160N has issues with the firmware.
Upgrade the firmware of the router. power cycle the router.
Click here for more information about router and network

are you trying to change the wireless settings of the router.
For this you will need to connect the computer to the router.
open the set up page of the router.
change the wireless settings on the router.
Then try to connect to the new wireless network.
Click Here for step by step solutions

you can try disconnecting and connecting again from your wireless network. if that doesn't work, try to access the configuration page of your wireless router, try to type in a different password for your wireless network and try connecting again.

If you have the correct wireless security and the laptop wont connect wirelessly, the best thing that you can do here is to access the router setup page and change some wireless settings on the router like the wireless channel , I advice you set the wireless channel to 11 then after that try to connect your laptop again to the wireless network and by the way change also the SSID or wireless network name of the router....

Try changing the channel on the router. It would be better to isolate the problem first by trying to connect to other wireless networks on your laptop or having someone's laptop connect to your home wireless network.

Hi,
you say it suddenly stopped working, if you can connect to the router via ethernet cable then try to access the router's web utility page and make sure your router is in mixed or G-only. If you can't still connect to the router through wireless then try restarting the Wireless Zero Configuration from windows. This is how it's made: Go to control panel and double-click "administrative tools", then double-click "services". You will see a list, scroll down to Wireless Zero Configuration and click "stop", you'll see a progress bar. After that click "start", you'll see another progress bar. Now try connecting to your router via wireless connection. If you still can't connect then repair the connection by right-clicking the wireless icon at the bottom right corner. Keep repairing until you connect.
Hope this works!