Have you just got a plain network bridge? (wireless and wired connection bridged) if so try running cmd then typing ipconfig /all to see what ip address, default gateway and primary dns server your laptops getting. It might be that one of these is wrong causing your laptop not to connect (all 3 are pretty vital for net access)
if they are wrong then you could try releasing and renewing them (assuming your laptops set to automatically obtain an IP) by typing ipconfig /release, then when its done type ipconfig /renew