Windows 2003 compatible mobile broadband card

Hi,

I have a laptop with Windows 2003 R2 (SP2) installed on it. I recently purchased an AT&T subscription for wireless broadband service that included a Sierra Wireless USBConnect 881 device.

However, the device does not support Windows 2003 and hence I am not able to connect.

Anybody aware of any other service provider/card that supports Windows 2003 Server?

Thanks in advance.