USB & reboot

All -
I have a Soyo P4S DRAGON Ultra / P4S-645D DRAGON Lite (info from Everest)

every time I plug a USB device in the system reboots. But if I plug the USB
device in and boot the system with the device pre attached - all is well.
Running XP SP2 and the USB devices work fine on other machines..
I get the following codes:
BCCode : 35 BCP1 : 864D0BF8 BCP2 : 00000000 BCP3 : 00000000
BCP4 : 00000000 OSVer : 5_1_2600 SP : 2_0 Product : 768_1

Any help is appreciated.
Thanks!

I have the same computer, and a similar problem. Mine doesn't reboo
every time, and only when I misalign the connectors when trying t
connect it (touching the shells together). My guess is that this i
somehow temporarily lowering the power voltage which causes th
reboot

Not an ideal solution, but leaving a USB extension cord plugged int
the USB connector and plugging the device into that seems to hav
solved the problem for me