Deployment Of SQLce - DATASOURCE Issue

My connection string is simply
Data Source ="|DataDirectory|DataTest.sdf"; Password ="test";

and it runs just fine...

I did a simple publish (simple public, no checking for updates or anything)

When the public completes I run the install app. I get the following odd error during install:

************** Exception Text **************
The path is not valid. Check the directory for the database. [ Path = C:Documents and SettingsjlibertorLocal SettingsApps2.0DataDZN9D6Y7.8E9N0WB27KY.XZB est..tion_b3b178185207c0b7_0001.0000_ef52a43c912d4680DataDataTest.sdf ]


So... any ideas? thansk so much in advance!