Hi,
1.What is the make and model of the computer?
2.Is the issue confined to this device?
3.Was this device working fine on the computer previously?
4.Did you make any changes to the computer recently?
5.How is this device connected to the computer?
6.Where did you search for drivers?
7.Who is the Internet Service Provider?
Please provide us with more relevant information to continue with the troubleshooting accordingly.
Refer the link on how to ask questions or help on Forums.
Suggestions for asking a question on help forums: http://support.microsoft.com/kb/555375
If you are connecting the device using an USB port, then I would suggest you to refer to this article and check if that helps.
Install a USB device: http://windows.microsoft.com/en-us/windows7/Install-a-USB-device
Hope this helps.