I have backed up all my sms in nokia suite. Now when I try to restore them back to n9 I have a few problems.

The first one is that it only copies one sms a few seconds, so it takes ages to copy over 3000 sms. But that is not the biggest problem, I have time.

Messages on N9 are not in conversations form anymore. All messages, both sent and received are shown only as received.

How to fix this problem?