Thank you for your post.
Yes, you are making sense, but I cannot duplicate the problem.
I have FileMaker Server 9 running on several servers, and I can access the servers that I have full read/write privileges and copy files to any of the directories. FileMaker Server does not put a lock on any folder. Therefore, you may want to check account privileges for that folder.
You're right, permission problem, i was in 2 different groups and i didnt know that, one of then had less permissions. Thank you again.