ARM mp3 player

hye
im currently doing the arm mp3 project...im using yagarto as the ide and 
SAM-BA tu burn the files in my microcontroller(SAM7-E*256)...the problem 
occurs when playing the mp3 files...it can play for about a minute but 
after that,only noise could be heard(the mp3 files stopped 
playing)...when i press for the ne*t file,it could only play for about 
30 seconds,and the same problem arises...what could be the problem?can 
somebody help me?
thnks a bunch