Banned User

[Labomba]

I'm having a problem with a fresh zentyal 4.2 installation and squid.
After installing and activating the squid module, I always get a Denied error screen when accessing a http website on a client:
Your username is not allowed to web browse: -
Access Denied
Banned User.

https and ping work fine.
I now that the squid module is not included in the 4.2 but I supposse that it should work correctly?
Can this error by caused because something extra needs to be installed or maybe a extra configuration is needed.
I have done several new installations but the error stays the same.
In the access rules for the proxy I have nothing special, just:
All Time - any - allow all
Greetz,

[Labomba]

Strange thing is that I have an older server with the 4.2.2 version and squid running fine.
Done several reinstall now and tried different approaches....
Anybody else having this problem?