C:\temp>perl mp3_rename.pl
Artist is Rascal Flatts
Album is Unstoppable
Title is Here Comes Goodbye
Tracknum is 2
OK
Couldn't rename c:\temp\music\01_rascal flatts_-_ here_comes_goodbye.mp3 to c:\temp\music\Rascal Flatts_Here Comes Goodbye.mp3: Permission denied