No worries man. This card has out of the box driver support, and is one of the most widely used cards. The drivers are fine. Concentrate on your connection setup, cables, hub, etc. The problem is NOT with your drivers.
You have stated in your post that you aren't able to contact anyone in your workgroup. What about connectivity at all? Have you checked to make sure that the link light on the back (green solid) is on to show a connection?
How do you have this set up? Are you hooked into a hub? Another computer? Are you using a crossover cable? Should you be? Don't mess with the setting on the advanced tab unless you want to screw something up. If you are comfortable changing those, go ahead, but be prepared to have some crazy things happen. The default setup is fine for the average user/gamer.
Have you even checked to see if your IP is valid? Are you using ICS? Are you using DHCP? Are you assigning your IP's?
More info = more help.