Hi Eric and others reading in here!
As already announced, I solved my printer problem AND glad to see, I have no login problem as well anymore, superb!
Now I found a bit "naive" neighbour with an unsecure wlan via linksys router and voila´ : my wlan connection via wifi manager stays stable and is started automatically.
So the issue of ´re-configuring´ my connection on every new system start seems to be on the ´encryption´ or ´network key´ side. Will dig into that issue later again!
So far I can work smoothly with GhostBSD 3.5 now, unless that old Maxtor hardrive will have a "burnout" and I have to start anew.
thanks for the replies, have a nice weekend!