Hide the prompt dialog

Hi,

I am using relational universe (Oracle) as data source for my design studio 1.3 application. I want to pass the universe prompt value from Design Studio drop down component. Here is my code in Application on startup event:

APPLICATION.setVariableValue("psEnter Market Basket ID", "3"); //prompt from universe

DS_1.loadDataSource();//loading data source

But still I am getting prompt dialog box to enter/select the prompt values. I need to hide the prompt dialog and pass the value in my code. Can anyone please help on this.