I was setting up my xbox 360 wireless controller at the weekend to play Batman and just to remind people you need a wireless receiver to plug into a usb port on your pc in order to use a wireless controller (sounds obvious doesn't it!) even if you are using the re-charging kit. Either that or you need to buy a wired controller.
Tis a good reminder, the play and charge kits only charge the controller, as the play bit is still connecting via wireless to the xbox, so won't work with a PC to play with.