Folder Access

On my SBS 2003, I have folder redirection on all client My Documents folders. All of a sudden, they are no longer allowed to create or delete the folders or files that are in the My documents folder. It says that access is denied. But they are able to execute the files. If there is a Word document in there, they can open it, change it. But can’t save the changes bak to the My Documents folder. Anyone know why this might be?