am having a motherboard problem

I am having a huge problem with my motherboard, every time i connect my flash drive to my computer
when i safely remove the drive my computer restarts. if you need the specs, i have a chaintech s1689, AMD 64 30000+, 1 GB OF RAM (DUAL CHANNEL), I've been searching all over google for the manual for my motherboard to check if any of the jumps for the usb are in the wrong position, but no luck... if anyone has any ideas thanks