I copied my contacts from my 3gs via ssh from:

private/var/mobile/library/AddressBook

Now that I have my iphone 4 I'm trying to copy the saved files from my computer back to the iphone 4's files but it doesn't recognize them.

I get a loading statuts bar which starts to want to load but freezes almost right away. Contacts are left empty.

Is there a step or compatibility issue I'm overlooking or not aware of?