I cant sync my songs or vids into my iPad. I think it is because i recently updated the iOS to 5.1.1 and also I had some apps in the iPad which were not my account. When i try to sync songs in iTunes it just informs me there are apps with issues or something but i clicked do not show me again so now i cannot remember which are the apps which aren't from my account. I also hope i can sync the songs and still keep these apps. What can i do?