Trouble with iPhone iTunes sync after unlocking iphone iPhone 4S

I have just tried to do my usual manual Iphone sync through itunes but in the music menu, the check boxes are that annoying untouchable light grey color and it would seem i no longer have the rights to change my music selection.  The same for the movies too.

The timing is odd and i think it may have something to do with me trying a different sim card in my phone (which didnt work as my phone was locked) and on replacing my original sim, i was sent an email from apple "welcoming" me to my new iphone??  I didnt think much of it and went ahead and had my iphone unlocked two days ago so i could use the new country sim, im not sure if this has anything to do with it but its a huge hassle.  Any help is apprieciated!