No internet connection on wireless HomeGroup, though ping works

I have HP Compaq 6710b running Windows 7 Professional and Linksys WRT54GL.
I set the wireless network as HomeGroup and I use DHCP to assign IP addresses and everything worked fine.
Until i lost internet connectivity.

- My network and sharing center says i have internet, but i cannot browse pages.
- I can ping sites, ping works. So DNS is fine. ICMP connectivity works.
- I disabled windows firewall and antivirus to see if it cuts http, but it still didn't work.
- When i directly connect the notebook through a router - it works.
- Another Vista home notebook on same wireless network - it works.
- Same notebook on different network (on my job) - it works.
- The router log registers http traffic when i try to open a page by browser, but it still doesn't open it
- and I tried opera, firefox IE & skype.

I think it is some issue with the HomeGroup options, somethings blocks my win 7 pc, but I cannot figure what.
Please help me.

Ivan Hantov

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