dsl connection won't stay connected to browser

[breezer7]

I just got DSL thru Bellsouth. The little icon down in the corner shows a connection. However, after browing a little while (abt. 20 minutes), my browser cannot find the webpage and says "Can't find server" and DNSL problem, etc.

Can anyone help me with this problem? I have called Bellsouth's tech support and they have run me thru a few little tests, etc, but they end up suggesting I call a Bellsouth technician. I cannot afford that so am hoping you can help me with this problem.

Why does it show connected, but seems disconnected from my browser? Any ideas? Thanks for all your help. Pat

PS/I have Windows XP on a new Compaq. Thanks.