Would appreciate any help on this one;

The situation is

All equipment connected correctly
Internet LED on router is green
PC aquire's an address of from wireless router
Can connect to the router via browser using

It appears I have an Internet connection a
ADSL info gives
IP address 90.202 etc etc
Default gateway
I cannot connect to any www pages ??????? (browser setting medium)

when I run the test connection to sky the connection fails
Am I missing something really easy here ?