Hi Using VS2005, C#, SQL Server 2000 (installed on my local machine). Everything has been OK until suddenly, when trying to create a new data source, I keep getting the following error dialog/message:- "An unexpected error occured in the .NET Framework Data Provider for SQL Server Mobile Edition. Please contact the provider vendor to resolve this problem." I am not using the version of SQL server in the message and I have changed nothing in my configuration. Any ideas how to fix this? Many thanks.