Changing "File" to mp3?

Seems the extension of the file in not mentioned in the entire file. Please go to My Computer -> Tools -> Folder Options. Click the 'View' tab. Uncheck the option 'Hide extensions for known file types' and apply... Now check ur song files, if in the file name, '.xxx' extension format doesnt appear at last then therez a missing extension, in that case add '.mp3' or '.wmv' with the file name at the end. You may not be able to upload ur songs in Napster bcoz they may not have extensions ociated and Napster is not able to check the file type u r uploading...