I have a sony ericsson z550 and i just uploaded 50 sings in it thre a card reader....and when i plugged in my earphones..it played quite well but then there are these small breaks or scratches in between the files....they really ruin my mood some songs have these breaks a lot while others have a few....please could anyone tell me why is this happening?

i also have formatted the memory card once and loaded the songs again but the same thing is happening...