mn-100 broadband base station

I have recently switched from Charter Pipeline to AT&T/Yahoo DSL and have 
tried to set-up my Microsoft Base Station with my new provider.  I have
reset 
my router and for the first 2 minutes, both of my connnected computers
work 
and have internet access.  After these 2 minutes, internet web pages are
no 
longer available, yet my station still suggests that connectivity is still

there.  I have tried to update my firmware, but that page is no longer 
available to upgrade.  Any help is appreciated, since I am no longer able
to 
get help via phone/chat session with Microsoft.