deleting a file

[Joe Bollard]

friends, i have a pen drive on which there is a file that i cannot delete, 
it's an audio file, and when i try to delete it i get the message "cannot 
delete file, cannot read from source file or disk"  any suggestions, i want 
to use the pen drive for some other work and the file is getting in the way, 
any help will be really appreciated, god bless, travel safely, joe bollard, 
the republic of ireland.