Actually I got the following error:
Error 1 Error 175: The specified store provider cannot be found in the configuration, or is not valid.
And reading your last post explains why I keep getting this error, eventhough I checked the App.Config several times and nothing seems to be wrong there. I'll try to find the SQL CE Provider and fix the error. Let's see how things will go...
By the way, does that mean I'll have to download the provider on the client's machine as well? Isn't there a way to include it inside the installer or some other work around?