IPhone not recognised by iTunes
I recently bought a new iMac and transferred my user account across from my old Macbook Pro.
everything is working perfectly except neither mine nor my girlfriends iPhones are being shown in iTunes. If I plug them into the laptop iTunes detects them and all is well but there is nothing at all on the iMac. I've tried all of the USB ports, two different cables, reinstalling iTunes etc.
Any help at all would be appreciated.