Exported MP3s play only in Audacity

I have WXP and Audacity 2.0.4. and gramophone with USB output. I record song to audacity and save to mp3 format. File mp3 is possible play in audacity but mith WMP or VLC player i get no sound. Where is Problem? Thanks.

I have split your post to make a new topic as it is not directly related to the topic that was being discussed.

The problem sounds like it could be this issue: http://manual.audacityteam.org/o/man/faq_playback.html#usb