The casio ctk-4000 has an plug and play usb conection but if i huck it up to my laptop(windows7) or computer(windows xp) doesn't there comes anythink poping up in my screen. and if i go to "my computer" i cant find it. ive tried typing the name of the keyboard into my start menu but no results excuse my bad engllisch

Question moved to Casio Keyboards.

Take it in for service. Sounds like it needs a new switch or control board.

https://www.google.com/search?q=Casio+CTK+4400

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If you connect to PC using USB interface, then use a commercial midi player - e.g Melody Assistant or Harmony assistant to play MIDI files to it.

Or else download "SMF convertor" to convert midi files and download compatible file to keyboard.

I prefer, only in CASIO authorized service

Unplug the USB cable.
Download correct driverfor your OS from
http://support.casio.com/en/support/download.php?cid=008&pid=20
You need to load the driver first and only plug in the USB cable when the software tells you to do so.

If your computer has a SD card reader, you can use a 2GB or smaller SD card. Format the SD card using the CTK4000. Drop tje music into "MUSICDAT" folder.
If you connect to PC using a USB cable, you need to download DATA MANAGER from Casio website. DATA MANAGER allows you to copy files from computer to keyboard.

Hello,

You need a midi to usb interface, otherwise it is quite simple. I personally have an M-Audio interface that plugs into my midi out and plugs into your usb port on your computer. Once done, you can create a profile in Reason for your CTK. Windows 7 will notice the M-Audio device and then you will be able to use midi. You may have to install a specific driver for the particular M-AUdio device (or another midi to usb interface) but that is simple. You do not have to worry about a driver for the keyboard.

In my experience, M-Audio makes about the best midi/usb interface, and they come in all popular configurations. I use a very small 1-to-1 interface, though there are multi port interfaces one can buy. I purchased mine on eBay, though you can find them at Guitar Center if you have one in your City, or alternately Musiciansfriend.com web site. Many online stores sell them though. You amy want to use Amazon or a price comparison web site to find your best deal.

Thank you for using FixYa, and good luck.

Just did it today. Hooked up CTK-720 to Imac with Snow Leopard (10.2.6) using GarageBand.
Steps: 1) Go to : http://code.google.com/p/casiousbmididriver/ 2) Download the CasioUSBMIDIDriver.plugin (see the two choices on the right side of screen) 3) Place the CasioUSBMIDIDriver.Plugin file into the MIDI Driver subfolder: Macintosh HD => Library => Audio => MIDI Drivers 4) Restart 5) Plug in USB cable, open GarageBand, turn on Casio 6) In GraarageBand Open New Project, Start by using Piano, Select Keyboard (command K) in the Window menu 7) You should see the keyboard being played on the screen.
PS: Thank you Francois Ferland.

On reading specs, use of the USB is NOT supported on a MAC or on other than the 32 bit version of Vista. If you happen to have the 64 bit Vista, it won't work. All the other versions of Windows seem to be supported..

SOMETIMES one must install the software BEFORE connecting the USB cable to the unit. SOMETIMES one must install the drivers in SAFE MODE. These things are ridiculous, but some of the quirks of Windows are stupid.

Try downloading MidiOx and troubleshooting with it. It will show you if you have any midi activity and which channel your Casio is transmitting on etc.

Try uninstalling and reinstalling both the keyboard and the game. If that doesn't work then the keyboard may not be compatible with the software.