sonu_a

Hi,
I have a usb modem driver.
When i try the following..
1) Plug the device
2) Open Hyperterminal
3) Type some AT Commands
4) Unplug the device (Make sure that Hyperterminal application is
not closed)
5) Plug the device again
6) Close the Hyperteminal Application
7) Now try to query the modem from device manager.

A message box pops up showing "Cannot open port"..
Anybody has encountered this problem.
Thanks and regards,
sonu