problem with Reportnet Drill through...........

[MacintoshF16]

i have problem with one report in reprot studio.
the situation like below..
i have one prompt that mutiple select value prompt ie optional. i have values for Sites like
SanJose, Pasadena, Greensboro.
my requirement is, in the prompt, it shoud show 'All' (Default should be 'All') value and if user doesnt select anything in the prompt, it shud show all the values of SanJose, SantaClara, Greensboro. I dont have any caluculated fields in the table. iam using only one summary table.
I am tryin to create with static choices and Default selections ( prompt properties) but i cudnt.
In report studio how to implement this? Please give the solution.

and samething...i have prob with Passing variables from Master to Child reprot.

this is Drill through report....
i have created master report (above reprot) on summary table and i have model, based on this model i have created detail reprot. Ther is no relationship between Summary table and the model(But Summany table and the model in the same package) I wud like to pass the same filters which i have passed in Master report to the Child reprot. Please provide the solution how to pass the filters to child reprot.

Thanks

MAc