Solved: How to activate Web Analytics on Local Groups' Sub-domain

Continuing the discussion from Community Wiki - who use it and for what?:

Does anybody know how to activate Google Analytics for (replace xx with local group’s country code)? I get error message “URL is invalid”. Is it because OK Central has it activated for domain?

Does anyone run Piwik Analytics remotely instead? All advice appreciated! Please put instructions on wiki.

Edit: Topic solved.