What RAZR kills Windows sharing

All you know droider? First off, many droider haven't changed any of the settings on RAZR for anything related to USB connections. When people plug phone into computer, get (2) connected drives (one for internal memory and one for external memory), which they didn't figure was too much of an issue. But, discovered that when the RAZR is attached, it kills the computer it's attached to sharing, and other computers are not able to access the shares. (Win7 Professional / 64Bit). The shares are still visible on the client, and appear to be configured right, but no one can connect. It appears that the shares don't exist at all to other computers. And, it won't come back, until after a reboot. Then sharing is there, until people reattach my RAZR.