[Jaysama]

Hello again.
This may not seem like a big deal to all reading this, but this is driving me friggin crazy!

I bought an iPod Touch back in February. Loved it. Loaded up all my artwork to it without a problem at all.
A few weeks ago I decided I needed one with more gigs, so I sold my old one and got a new iPod touch. When I hooked the new one up to my iTunes, I had no problem putting all of my old songs etc onto it. But then when I looked at my iPod, I noticed alot of the artwork was suddenly missing! So I've been going throgh all my songs trying to put the artwork back. On some I can.. but on others, the artwork will simply not stay imbedded! I put the artwork into the individual songs, nothing. I try putting it into the grouped 'get info' window, wont stay. It shows the artwork is there, then I hit 'okay' and open it back up, and it's gone. And my iTunes doesnt seem to want look for the artwork on it's own. I click on the option for iTunes/Store to look for the artwork, but nothing happens.

Anyone have any thoughts as to what I'm doin wrong?
Thank you in advance for your help!