deploying with default parameter value

I have an application with a parameter that has a single value drop down list from a query. My dataset has a union with "0","All". I set the default to non-queried, value "0". I go to preview and BI displays the label correctly as "All". When I deploy the app and view it in the web browser the default value is not displayed correctly, and it shows "Select a value". Why, why, why does it preview correctly yet deploys incorrectly, and how can I fix it
From http://www.developmentnow.com/g/115_0_0_0_0_0/sql-server-reporting-services.ht
Posted via DevelopmentNow.com Group
http://www.developmentnow.comYou can try deleting the earlier deployed report from Report Manager
and deploy the modified report which is previewing fine with all
default values.
Thanks
Subhash