[TSAdmin]

The moment I mentioned something similar to this to someone who was having trouble downloading through Graal to their computer, it started popping up alot.

It turned out that most people who had this problem were running Vista and had their Graal Folder in the "Program Files" folder, which in Vista is a Protected System Folder and would not let the Graal.exe file write anything at all to the subfolders. If you're using Vista, try moving your entire Graal Folder to a personal folder, then follow Tig's instruction of deleting FILENAMECACHE.txt, and restart Graal.

Alternatively, you could also grant yourself full permissions to the Graal Folder within the Program Files folder and leave it there, then delete FILENAMECACHE.txt anyway and try that out.

If this is not the case, and you are not running Vista/it's not in a protected system folder, just try Tig's step and reply here if it works or doesn't.