Deleteing a file using Unlink()

Hrrrm, seems I can't get the unlink command to work, is there a better way to delete files in Win2k? Always errors out that it can't find the file. I'm assuming this is an NT Permissions issue, even though the files are set full control by the user IIS/PHP is running as. Another note, these files were written to the drive using PHP, so I don't understand why it's having issues removing them. Any suggestions on the most "stable" or "secure" way to do this? Ryan