How to protect (take backups) SQL 2014 AAG databases from DPM 2012 R2 with RU2

We have just upgraded / replaced our SQL Server plattform in the following way:

SQL Servers:

1. 3 Servers running Windows 2008 R2 + SQL Server 2012 CU9
2. Upgraded to SQL 2014 so the system databases were up to the latest level
3. Removed all AlwaysOn AAG, destroyed cluster etc
4. Then total reinstall of all servers with Windows 2012 R2 + fresh install of SQL 2014
5. Replaced the fresh system databases with the old upgraded databases
6. Upgraded SQL 2014 With CU2
7. Re-setup a New cluster and AlwaysOn. All SQL Servers are running fine

DPM 2012 R2 With RU2:

1. Removed all previous backups of both AAG, Bare Metal etc related to the old servers.
2. Uninstall the DPM agents 
3. Reinstalled agents after the 3 new serves where ready
4. Added Bare Metal backup. Works fine.
5. Added SQL Server backup of databases not part of any AAGs. Works fine.
6. Then comes the problem: I try to add protection of the new AAG's in DPM. I can see the new cluster and the AAG's, but when I try expand each Group, nothing shows up. It takes around 20 sec or so after I try to expand.

Any clue about what can be wrong?

Per