I just got a used Dell Dimension 8200, Windows XP, desk top, computer.  It has a CNet PRO200 PCI Fast Ethernet Adapter, and I have also installed a T-Mobile Rocket Wireless Ethernet Adapter.  I have been attempting to get online, using the T-Mobile Rocket.  The Rocket seems to be making a connection, but when I attempt to get online, I get an error message stating I am not connected to the internet. Any help is appreciated.