Ipod help!

so I have a ipod touch, I have had it for about two years now. I love it, but I download a album from a CD, and a little bit at a time each song is not appearing on it. and when I try to play the songs I bought on my laptop. they wont play, they say...

that the file can not be found, but they play on my ipod? so I don't know if I should get it checked out, or if I can do something here.

if the songs are still on your labtop then you can try to drage and drop them in to itunes and see if they work then if they do then you can get rid of the songs that dont work
hope it works :-))