Wireless Multimedia Keyboard 1.0a

I have bought Microsoft WUR0446 Wireless Multimedia Keyboard 1.0A form office but my home system has USB ports. I have bought ps2 to USB adapter but my system says "The device plugged into the USB port is not working/recognized". Any idea what might be wrong?? have i picked up a bad ps2 to USB adapter??

I think so, in my experience ps2 to USB adapter doesn't work all the time. I had to bought three of them for getting one of them working for one of my old system while connecting a keyboard.