Well, it should be obvious...
At run time, your file is located here: \Program Files\jhepfner\jhepfner.sdf;
At design time it is located here: C:\Documents and Settings\Compaq_Owner\Local Settings\Application Data\Temporary Projects\jhepfner\jhepfner.sdf

Clearly not the same place... so it's no wonder... if you're checkign your database in the server explorer for the data, it's not going to be there because that's not the COPY that you wrote to.

Also, you may want to read the link in my sig "I swear I saved my data, where'd it run off to?" ... it might help shed some light on this. (or it may not, but at least give it a go and see if it applies).

-tg