Hey, i got a problem. I want to access the world of the Gothic II-Addon but got lost on my trail.
I already found the missing persons and told Vatras about them, the quest is still in my Log though.
I killed everyone in the sewers.
I helped Diego to get the house in the upper city.
I freed Bennet.
I killed Dexter.
I got the Ring of Water? If that is the correct translation.
But that's it... The Mages in the Ruins won't talk to me about the fragments and Vatras won't talk with me about anything Eye of Innos or Addon related anymore. Last thing he told me, was to get to the inn outside of town to finish the initiation ritual to join their water mage-guild or whatever they are.
But nobody except for the innkeper, the guy who holds drinking contests and a few pawns are there.
The innkeeper recognizes me as a member of the mages and grants me free shelter but there is nothing more i can do there.
can anybody help?

Ok, used the forget scroll on him and he finally recognized the ring but i ran into another problem just a few quests later...

PS: GoG, you should let the OP of a topic mark it as a "problem" even after it was created.

if you are using the German version of the game try this patch and talk with Lares again. He should be leading you to the watermages again and everything will settle. Hopefully that does work. Had very similar problems today and going with Lares fixed everything.
Script Patch: http://www.worldofgothic.de/dl/download_111.htm
The quest will remain in your log because it can be finished only in the new world the addon adds.