USB Management Problem

Hi

Do anyone had any problems with Tablet USB Management it stops showing up when connecting the tablet to the PC?
I am not getting the SDCard and Internal RAM drive on windows explorer not matter which PC I use, it will not show up, even the tablet USB Management menu is not showing up any more, the only thing it does is charges my tablet when I connect it to my PC(s).
The USB drivers (tablet) are installed in the PC(s) and it worked fine, the tablet USB function work perfectly but now its not working any more, seems to happen to all my tablets.

Sal.