my addressbook is not communicating with iTunes!!HELP!!

I can't sync my IOS devices with my last version of the address book! I updated my address book in my Macbook Pro OS X 10.6.8 and then it is not communicating with iTunes. I tried the 28 step troubleshooting to this issue, my iTunes cache is clean but still not syncronizing... Tried to use iCloud online to upload the vcf cards but in each group it losts a lot of contacts (and I don't know why, because they are far away from the iCloud limits...).