Please Help Me with authorizing my iPod Touch

[Greenboy555]

Please help. I was given an iPod Touch around a month ago. I bought the 3.0 software almost immediatly. After a while, I noticed all my purchased songs would not play. Specifically, they would play, but no sound would come out, either with or without speakers. BUt the next song I play, one from a ripped CD, would play no problem. After that, I noticed that the apps I bought (all free, for example, yahoo messanger) wouldn't work either. I'd open them, and they'd close half a second after being opened.
I assume there's some way to authorize my iPod to recognize my own purchases, but I can't figure out. THank you, will be checking back soon.

[JediMeister]

Quickest fix with the least fuss is to go to the Applications tab while the iPod is connected, under Sync Selected Applications, un-check one app, sync, then re-enable the syncing of the previously removed app. This should reauthorize all your content on the iPod to your iTunes account.

[Greenboy555]

Ok, here's the problem. I did that, and it didn't work. Tried deleting the app, and redownloading it, and that didn't fix my problem either. I don't know what else to do... help?

P.S. Thanks for the prompt reply

[JediMeister]

You can also try going to the Settings->Store screen, signing out, and then back in with your AppleID.