[Q] Google Apps have no connection to server? topic

Hello,

since yesterday my Youtube App stopped suddenly to load videos (401 Error) I could browse them though only playback was not possible.

Google Play stopped working too, it has no connection and when I try to add a new google account it says "no stable connection to google servers" etc.

I have searched the web, followed some suggestions already, like clearing the cache partition and deleting the dalvik cache.
Even deleted Youtube / Google Services / Uninstalled Google Play updates.

And downloaded the .apk for Google Play manually.
Nothing helps.

Is there anything I could do now?

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Runnning CM7 on a LG P500