Pickety wrote:Hmm, i dont even know what a schrank is...mabye if you post some pictures of this "schrank" and the keys, you may get some more helpful replies. If you are really unable to post some pics, at least try to describe it in some detail.
It is an item of furniture, usually like a sideboard or display case for a house. Most I have seen are large, elaborate and well made.
As to the original posters question.
Are you sure you put all the pieces back in the right way?
Blacken the part of the key that goes into the lock (use a candle) and then gently try the key. See if there are any marks that would indicate where the lock is sticking.
From the description, it sounds like the key may be starting to turn, but then gets stuck trying to retract the bolt. If this is the case, I would expect the blackening to be marked on the top portion of the key furthest away from bow as this is normally the part that moves the bolt.
The locks in these cabinets are usually fairly simple lever style locks. Searching the forums here will give you alot more detailed information on these types of locks.