While looking at another problem at a customer location I found a returning 4000 event every 15 minutes with message GetSQL2008DBSpace.js : 0 on the SQL 2008 server there.
At the MP Guide site I found the following: Every system with SQL Server 2008 that will be monitored must have SQL-DMO installed from the Microsoft SQL Server 2005 Backward Compatibility Components.
These components where not ready installed on this SQL Server so I downloaded and installed the right MSI. Make sure you just download the Microsoft SQL Server 2005 Backward Compatibility Components.
After that no more 4000 events have been logged.
If you still have these 4000 events after installing the right components please visit this blog. Here Marnix Wolf describes that you have to register SQLDMO.DLL to get rid of these events. Thanks Marnix.
Bastiaan van Onselen