putting files into folders

limewire will not allow me to add my files into a folder anymore... why is this and can i fix it? If I can not fix it is there a way to get all the files I put into folders out of them?

1. Try a different folder. 2. Try copy and paste 3. Harddrive too full? 4. Try repairing L/W under add/remove programs 5. "Access Denied" error can mean that someone else is uploading those files, then you have to shut L/W down to move them.