【求助】

Hi,
  
I have a NR-70V .. I know how to import the mo3 file to my palm, thru MS-Import.  But sometimes, I found that the Palm cannot recon. my mp3 files.  I have put in the MS Folder /PALM/PROGRAMS/MSAUDIO.  BUt sometimes it is ok.  I am wondering the support format of the palm player.  And is there any other player that i can use except the default one ??   
  
Thanks