Why is SysTrackingContent suddenly empty in SqlServerCE (using SyncFramework) ?

Hi,

I am using SqlServer CE 3.5.1 with the SyncFramework 1.0 and EntityFramework 4.0.

Everything works fine until I update my database. After calling Context.SaveChanges() within my app the column of my Tracking "_SysTrackingContent" is empty. Before saving it was filled with values.

After a little research I found the static Method UpgradePublicTracking which seems to be the solution, but it isn't in my case.

Here the link http://technet.microsoft.com/en-us/library/system.data.sqlserverce.sqlcechangetracking.upgradepublictracking%28v=vs.97%29.aspx

Have you any hints to solve the problem?

best regards,

Thomas