tried every SP1, there is

1) Visual Studio 2008 SP1 - already installed , re-installed on top

2) Microsoft SQL Server Compact 3.5 Service Pack 1 and Synchronization Services for ADO.NET version 1.0 Service Pack 1 for Windows Desktop

already installed - repaired on top

3) Microsoft SQL Server Compact 3.5 Service Pack 1 for Windows Mobile

already installed

4) Microsoft SQL Server Compact 3.5 Service Pack 1 Server Tools

re-installed / repaired