SQL Server Configuration Table Runtime Loading Problem

The package works fine in development site. It was compiled with "Enable package configurations" and sql server as configuration type. But after installed in production database using deployment manifest, the package does not load the configuration values at run time from the table, instead it uses the variables' value in design time.



If the configuration is a file in windows folder, I may be able to load it from the sql job agent's step configuration tab. When configuration values are stored in a table, how can I make it load the configuration from there at run time?

Thanks.