On my local machine everything works fine.
I have uploaded my website to an ISP and while trying to open a page with GridView and a SqlDataSource connecting to SQL CE 4 sdf file following exception gets generated.
Server Error in '/' Application.
An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlServerCe.SqlCeException: [ 1884,d:\DZHosts\LocalUser\gasasso\www.gasasso.somee.com\App_Data\gasasso.sdf,SeCreateFile ]
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.