Networking :: no connection after 2 webpages loaded

after auto config via dhcp I can load a page or 2, then I dont have any connection anymore.

When I redo the network config I got another chance of loading a page of 2 :s

What can I be?

I use the onboard networkcard of my MSI neo2 board, and I got a speedtoch router, wired.

and yes Im an linux n00b