Downloaded songs no longer work

[peytonium]

This may be the wrong website to post on but the PS3 forums blow as far as getting my question answered. I downloaded quite a few songs and I'd say 2/3s of them no longer work. You pick them and wait, then it throws you back to the main screen acting like you don't have them anymore. I went to the store and my "downloaded files" have been cleared. How do I get those songs back? Because I'm rather pissed because I'm out that money.