the kb and mouse arent working on this computer. i jusr upgraded from winme to winxp pro. its the ps2/kb ports that arent working, im typing this with a usb mouse and on screen kb. but winxp still see's the kb/mouse as being installed and working in the addhardware cntrl panel. wtf? the lights dont even work on the keyboard. btw this is on a dell xpst500. plz help!