iTunes Match Gone From iTunes

Hey Guys,

Just purchased iTunes match. iTunes froze while uploading one song to the cloud. I logged off my mac and when I log back on iTunes Match had literally disappeared from iTunes. The "Match" Icon is gone so is the "Match" column under my songs and the cloud symbol beside them. I quit iTunes a bunch of times nothing happened. I didn't get my money back or anything so just wondering what I can do?

Thanks