W595 music playback

I'm having trouble paying albums on my new W595.

It starts off playing the first track but then about 3 or 4 seconds before the end of track (while trying to access the second track I'm guessing here) the screen flashes up "Failed" and stops playing. I can manually skip from track to track easily enough though.

I've tried making a playlist but the same thing happens. I've tried 2 different SIMs and 3 different memory cards and also tried putting the music direct into the phone memory but the same thing happens every time.

All the music is encoded as 128kbps MP3, joint stereo. The memory cards are 2GB and 8GB that work fine with other devices (card readers & PSP).

I've done a master reset AND used the Sony update to reflash the phone to no avail.

Any ideas?

Cheers