Not able to browse internet

[selvag]

hi..

i have installed mac os zep. 10.5.2. rev.2 ... l'm not able to browse internet... network connection everything perfect...
i tried with ping with my ip address i'm getting replay.... but when i open browser not able to connect internet... same net connection was worked last week and connection working in xp boot...

how to solve this.. plz... help...

thanks