We have a user with a Palm Centro, trying to connect to Zimbra Network Edition using Zimbra Mobile. When trying to sync, he gets the error "Error connecting to server. Please check your network or server settings and resync."

We've played with the settings on the client, but it seems that there aren't many to play with. The server is using SSL, but interestingly when we disable SSL on the Centro it gives a different error: "Error syncing messages".

We've done a soft and hard reset. Anything else we can try? Anything on the server side?