Please download and reinstall PowerWorship 4.0. There is no need to uninstall the software first. You can install over top of your existing installation, if you prefer. Or you can optionally uninstall / reinstall.Cannot open 'C:\Documents and Settings\All Users\Application Data\PowerWorship\pW4\Data\pwrwsp.sdf'. Provider 'System.Data.SqlServerCe.3.5' not installed.
The above error message is related to a problem registering the database provider for Sql Server Compact Edition, version 3.5.
The problem will occur on some Windows systems, prior to the fix being made available for pW 4.0.