Xbox360 .. with a usb Keyboard.

Well actually, its a keyboard with a PS2/USB adapter on the end.. but when I plug it into my Xbox, the lights flash for a moment and then does nothing. Just sits there. I can't use it for messages, etc, but the internet told me I could. What am I doing wrong? Oh, and I'm not paying 180 bucks for that shitty adapter.

You could just use a regular keyboard... i do, and it works fine :D