Xbox with internet access but no Xbox live access

Hi Guys,

I have a problem with my xbox360 connectivity.
I used to connect to Xbox live using a wired connection to my router and everything worked fine.
now I got another wireless router that is being used in WDS configuration with the old one.

when I run the network test on the xbox it shows that the network and the internet connections are ok, but it can't connect to the live network.
I would like to add that i can stream files to my xbox regularly and i thought it has something to do with port forwarding that I didn't do well.

Any way, the main router is also the DHCP server and the xbox' ip is static with all the ports (80 3079) being forwarded to it. I disabled the DHCP server on the second router.
the main router is Linksys wrt54gl running tomato and the second one is an Edimax br-6204wg.

anyone?