itunes sync?

[goavs18]

I have only had my macbook for a few weeks and I have been having an issue I can't figure out how to fix, so he it is.

I have initially sync'd my iPad and iPhone with this new computer, last week I plugged my iPhone in to my iTunes and when I hit the sync button I got a popup saying that this iPhone has been sync'd with another iTunes Library and asked to cancel or erase and sync so I selected erase and sync, now today when I plug my phone in and hit sync that same popup comes up telling me that this iPhone has been sync'd with another iTunes library.

I have not changed anything in my library I have not imported the library again it is the same one I imported originally when I setup my macbook, so I don't know why it is doing this, I had the same thing with my iPad last week but didn't sync it because of the hassle of rearranging the apps and restoring all of the app info I have, i.e., nook app with having to download my books again which I had to do the first time I sync to my new mac.

Please help !!!

 

[bab2010]

You should authorize your computer to sync with your iPhone. In iTunes header, go to advance and click on authorize this computer after connecting your iPhone to your computer.