Cannot connect to my BB - Seems I have lost the last posting-

Hi All. I cannot connect to my BB. I have the drivers installed. If I go to the device manager page, I have USB serial converter A and B and Com13 installed and working. If I go to network connections - no USB network devices are listed.

All my computers are on fixed IP addresses. They are on 120.20.2.XX for example. Could this be problem ?

I can connect with My computer and see the files on the SD card. I can also logon with putty to a command prompt.