No icons are showing up in the Web Access page

HI!

I currently have the following setup:

5 * 2012  AD Domain

1 * 2012 R2 Remote desktop services server (RD Connection Broker, RD Session Host, RD Web Access)

1 * XP SP3 Client

1 * Windows 7 Client

When i try to connect to the weburl , it works fine, i can log on without any issue, however, not a single icon shows up.

I read several forums, and added the server in the RDS groups in Active Directory Users and Computers.

When i look in the eventviewer, i see the following error:

The Remote Desktop Connection Broker server could not enumerate the targets for the provider named NULL from the database.

Pooled virtual desktop collection name: NULL
Error: Logon to the database failed.

I read that you should receive an ActiveX component notification but this doesn't happen on either of the 2 clients.

Does anyone has an idea on how to overcome the issues i'm having?

Thanks in advance,

Kristof