code 43 error

Dear Friends,

I am facing one problem. I am using ML 350 g6 server. Installed Operating system 2008 server R2. When i installed server all usb ports working fine. After 1 month i am getting struggle. Usb keayboard,Mouse, Printer working fine. when i inserver external hdd or Usb flash disk i am getting this error. External hdd and usb flash is working fine another.

Pls assist me how to sort out this problem.