I am unable to complete a mission aquired by another member of the group for putting up a space station. Please look at attached screenshot you see that it does not count it as a new vessel it seems. It is clear in the image that it has docking port, antenna and solar panels. Thanks a lot for the quick replies, its very fun doing this coop. I also have a problem with Hohmann transfer crashing/freezing the game in Mechjeb maneuver planner. Last log lines was:
[LOG 22:42:19.121] DarkMultiPlayer: [2250.695] Cannot recover a non-server vessel!
[WRN 22:42:19.123] Vessel Mun Science Probe Debris was recovered for a refund of 200 Funds : it was debris cluttering up KSC.
Do not know if this was related to the crash, but that name is the vessel i was controlling when it was crashing.