How do I authorize my Iphone to play my music?

100 songs will not download onto my iphone because it says the computer isn't authorized to copy the songs onto my phone. I tried de-authorizing and reauthorizing my computer, but that doesn't work. Is there anything else I can try to get my music on my phone?How do I authorize my Iphone to play my music?that bothered me a lot before, after that, I choose PC Suite for iPhone, and problems solved, here is offical link for you to get it http://91.pandaapp.com/pcsuite/How do I authorize my Iphone to play my music?what happens is when you buy a song on a specific account, you can only play that song on computers that are authorized by the person who bought the song. So if you somehow transfered songs from someone elses computer and you are not on the same account you will not be able to play them. the only way around this is to tell theperson who you got the songs from to give you their account info and so you can authorize the songs to play,, keep in mmind that there are a limited amount of computers that can be authorized on the same account