Network Bridge and AOL

I have a DSL line, using Actiontec 1524 Gateway for my own and 3 other computers connected by wireless network (the others go directly to the gateway, rather than thru my computer). To best of my knowledge, we were all hooked together on a network for file sharing without a bridge. However, for reasons unknown, my computer ended up being inaccessible to the others and vice versa.

I ran the Windows XP Pro network setup wizard. It created a Network Bridge. Internet Explorer worked ok, or seemed to, but AOL detected an error in the connection. Shutting it down and reopening didn't help. Neither did rebooting. Neither did installing a new copy of AOL. Contacted AOL. We tried a couple of things, including rebuilding the AOL adapter, but that didn't solve it. Techie said it was "internal to the computer."

My computer connects to AOL but cannot access the web from AOL (although it does with Internet Explorer). Similarly, I cannot reach any news link, e.g., in AOL that links outside the site. I cannot access the AOL help screen, and the AOL desktop does not display the graphic I have chosen.

I tried deleting the bridge, but then couldn't connect to anything, so reinstalled it.

Any ideas on what to do?