I've correctly installed the Driver in my Desktop, got it to work once and than i can't get it to work. I know the modem is working properly b/c in the Device manager, it says" Device Working

When i try to go online, Internet Explorer Tells me:

Failed to connect to remote computer.
Could not detect modem. It may be in use, turned off, or not installed properly.

The Sync Cradle is installed & working properly.

What do i do?!?