[Lizard]

What happens when you push the Sync button on your Mac? How far does the progress indicator get? Are there any error messages in Console?

If you create an action on the Mac, can you sync it up to the server and then sync your iPhone and see it on your iPhone?

I know you're looking for answers, not more questions, but there are a lot of possible things that could be wrong, and a few more details can help us narrow down the possibilities.