Hi, I have set up my itunes and ipad to sync using wifi but it keeps coming up with an error message that it cant find my ipad. It gets through the back up and then gets stuck. I have restarted my ipad and itunes but it keeps doing the same thing, another message comes up to say that some files could not be transfered cause they are not recognised. Which is some of my music. This is my first apple product and I am clueless. please help.