xp can detect usb flash disks but not all

i bought a 2gb usb flash disk (fd) to replace my very old 256mb fd. xp was able to detect the new one but i cant find it in my computer.
so, i checked device manager and found a yellow exclamation bang beside the fd. i tried to uninstall it then let xp find it again but it keeps on prompting for a found new hardware screen.
i tried my old fd on the same usb port and was detected. i tried the new fd to other xp machines and were able to found it. i borrowed my friend’s working fd but my box can’t detect it also.
is there something wrong with my xp? pls help.