Hi braekling,
thank you very much.
After deleting the code I could activate the plugin and I could see there another configuration-setting ( there was – like you said – an old installation before (wondering who did that )). After changing the settings of the Plugin I inserted the deleted code again in 80800.php and tried to deactivate and activate again the plugin, which seems to work perfect.
Again, thank you very much for your help.
I marked this thread as solved, because I think there was an Error on my side ( the formerly installed PlugIn , maybe from an Co-Admin or something else) and wp-piwik works as it should.
kindly regards,
N00body
