Network USB ADSL modems

Hi Guys,

I am using Windows XP in Desktop and F17 in my Laptop. I'm using Teracom Type I ADSL 2 + CPE/Router modem and use the Ethernet the Internet is working fine in both Deskto and Laptop. But not able to use internet via USB cable in Fedora. As per the modem manual, I have installed ValcanUSBdriver too still no use. Please let me know if you need any details

Your help will be much appreciated.