New to Burning need some help :S

Well hi everyone im new here and new to burning also
and im having trouble burning music. i use Nero for burning music and for most of the songs i try to burn it says it is an invalid file type but for some of my songs it works… they are all .mp3 files can anyone help? XD

can happen if the original mp3 file is corrupt in part. try convert the mp3 files to WAV THEN importing into Nero. use dbpoweramp or some other mp3 to wav converter.
try here

They may also be just mislabeled as mp3 but be some other audio filetype that Nero can’t convert.