Hey Christian.
James from the Los Gatos meet last June. I think there has been a lot written about this (either here or on the Pagoda113 site)... oops, can I say that here??
In the meantime, you might try to fold the entire thing back down. Close the lid (and "forgeddaboutit") ... no seriously, after it is completely closed -- try it again. Sometimes, if the front half comes up too soon, the hinge can dislodge and seemingly lock the back part in there. The whole unit needs to come up simultaneously.
Good Luck
James
63 230SL