If I click OK, it continues with all the plug-in effects, and I have to force clising to get it away.
I don´t have any older version, so what shall I do?
This has nothing to do with an "older version". The camera tracker was only introduced in CS6. Check the relevant program and MediaCore folders for duplicates that may have been introduced by a busted install or whatever.
In case of doubt run the Creative Suite Cleaner Tool, delete the Adobe folders entirely and reinstall with a clean slate.