My iPod freezes whenever I plug it into my computer when playing a song.

My iPod freezes whenever I plug it into my computer when playing a song.

Also, it doesn't play some of my songs on it. It just skips to the next one, and if the next one doesn't play it just keep skipping to the next one.

I've restored it already and the same exact problems still occurs.

I have to restart it by pressing "menu" and "middle button" simultaneously. However whenever I plug it in while playing music next time, the same things happens!