C:Program FilesMicrosoft SQL Server Compact Editionv4.0 目录下面
选择下面这 7 个 SQL Server Compact DLL，并复制它们：
Sqlceca40.dll
Sqlcecompact40.dll
Sqlceer40EN.dll
Sqlceme40.dll
Sqlceoledb40.dll
Sqlceqp40.dll
到站点的Bin下面