Internet access fail when roaming AirportExpress + Time Capsule

Hi,

I am having a problem when roaming a Time Capsule based on a AirportExpress connected to internet. When I do so, using the Time Capsule to extend the wireless network, the internet breaks constantly.

Reading the article, I have the same problem that someone already said, the menus are not the same in the new AirPort Utility, and I am not sure if I have a conflict as explained in point 3 of the article.

Connecting the two bases by WiFi it works, but the speed is to slow, so I would like to connect it by cable, as sugested the best configuration by Apple.

Any help?

Best regards

Tiago