USB Pen Drive Hang…

I have just put a fresh installation of XP on my PC and while everything else seems OK, my 64Mb USB Pen Drive only works for about 5 seconds, after that it seems to lock up my whole PC, even Ctrl/Alt/Del won’t work ! However if I unplug it, the PC returns to normal. I have tried my Pen Drive in my laptop and it works fine. It used to work fine in my PC too, before I reinstalled Windows XP, that is.
Abit BE6-ll / P3 1GHz / 512Mb SDRAM / ATI Radeon

Regards, Dave Baker