I FOUND THE PROBLEM!! YAAAAAAAY!!!
I had to go into my mysql database and had to delete the last change in my bb_meta which was a change with sth. like wp_ prefix.
I’m so happy now.
Zat.
JPEG’s:
That was the change I made which produced the error:
http://drp.ly/wuZ2p
This are screens after solving.
http://drp.ly/wuP7T
http://drp.ly/wuSg7
http://drp.ly/wuRd7