its a space error
$shortfn(C:\Mijn documenten\muziek\WWE - The Anthology\CD1\01-cd1-unknown-world_wrestling_federation_signature-wcr.mp3)
still returns
C:\Mijn documenten\muziek\WWE - The Anthology\CD1\01-cd1-unknown-world_wrestling_federation_signature-wcr.mp3

and "" doesnt always work either if the filename has many spaces like yours.
mIRC doesnt like spaces too much


$maybe