Some songs does not play

Dear Sir,
i have a mp3 but there are some song run n sume are not so pls give me a solution. i have mp3 songs only not any other

Get hold of MediaInfo (free) and use it to show the details about your non-working mp3 files. If you compare the results to the working ones, you’ll probably find a common difference. If you need help interpreting the output from Mediainfo and/or re-encoding the problem files, post again.