Winamp error - unknown artists and song title error

[wap1050]

For some reason in winamp pro app it display the track number in the song title and doesn't always show the artists name. It says I have 110 songs under unknown artist even though that's not true.

[wap1050]

I fixed the problem with the track names. I just changed the settings of the file name format (right click on device and click preferences). I attached a screenshot for clarity. The unknown artists error happened because of bad id3 tags. according to mp3tag I have 117 song with bad id3 tags.