LiteOn SOHW-1653SX connection problems

guys i need help. my LiteOn SOHW-1653SX external DVD RW is not being detected by my pc when i plugged it in the USB2.0 port, i tried connecting it to other pc (WinXP) but still it wont work. previously, it was working fine but now it can’t even be detected when i plug it in. My guess was my brother was pulling the USB connector improperly when he uses it, or maybe a driver error.
Help Please!

How can it be fixed?

Im having the same problem its been working fine for months and now its just coming up as unknown device and i found a vso device in my device manage i uninstalled that cleaned up me regestry and its still nowworking so i uninstalled all my writing programs decripting programs and i know ive gone to far but i really dont know what to do now can anyone help