E398 Received. eBooks playback OK, but 5.5Mb song still failed

I received back ny E398 phone from repair shop. The technical person said they changed motherboard. Damn.

I tried playing back all the 1.5Mb eBook file. Now they sound all OK. BUt the "14-The Pussycat Dolls ft. Busta R - Don't Cha.[www.mixermusic.net].mp3" song file still skills once 7 seconds. Sigh.