unable to sync address book i pad

[Polink]

Hello,
since short my ipad does not sync the addresses from the addres book. I went back to the original settings, tried again and I still have an old version of my address book.
Does any one can tell me how to sync it with my actual addresses?

Thanks,
Polink

 

[twerppoet]

A few questions?

Computer OS?
Program with the addresses on it?
Sync method, iTunes or online?