Itunes keeps stopping

I am using Itunes to stream music to my system through a airport express. It works fine except recently Itunes keeps stopping. I have to go into Itunes and click on play again. It is starting to do this every song and a half. It is beyond being able to listen to. I tryed to restart the system that does not work. I removed Itunes from my computer and reloaded the program and that did not work. It is very frustrating. Any suggestions?