I found a glitch... hehehehe.

[Qwertygiy]

http://buildism.net/items/Lolhax/3520

The name of the file I uploaded was "Rickroll.mid".

Upload page?

http://buildism.net/add.php?type=1337

This glitch should, then, be self-explanatory.

[Jacob__mybb_import1]

The file isn't actually on the server anywhere. Kind of weird that you didn't get any errors, though...