Sync Server doesn´t work. Phoned with Apple Support, but they hang up.

Hi Folks,

my Mac Book Pro crashed, the hard drive couldn´t readout the Mac OS anymore. So I bought a new hard drive and I was told from an Apple Guy not to use any time machine backups, but to do a full and clean install of the OS and all the Apps. Then I added my music into iTunes (all new install from an external hard drive). After that full clean new installation of all that stuff my iPhone won´t sync with my MacBookPro. It just says the "Sync-Server" doesn´t work. Any Ideas?

Thanks in advance!