Windows 7 - HUAWEI USB 3G modem removal issue

Hey,

I moved to Honduras for work last month and the internet option i chose was a company called TIGO, which issued me a 3G USB modem. Upon inserting into the USB port, the modem automatically installs some drivers, then I install the connection software called Internet Movil. It then automatically installs more driver software and I can use the internet.

The problem comes when I remove the USB device, or shut down the computer with the device still in the USB port. If i plug it back in later, it attempts to install the driver software again and stalls. I have to manually shut down the computer, restart it, completely uninstall Internet Movil, restart, plug the modem in again, let it install the drivers and then install Internet Movil again.

I'm running Windows 7 Ultimate on a Sony Vaio F Series notebook. My two roommates (one has a Dell with Windows 7 Professional and the other has a Macbook Pro) have no problems simply unplugging and plugging in later. I've been through this routine described above about 7 times and I have no idea what the problem is. I tried "safely removing" the hardware, but I get no indication that it is safe to remove after I click "eject CD Drive F: Internet Movil."

Please help.