multi value param mapping ssrs ?

[timbaktuu]

Hello all,

I have 2 datasets in my report

dataset 1 main result set comes from stored proc with @fromdate @ todate params has customer.name field.

dataset 2 only to populate custome names in drodown list (simple select statement from customers) that has only one field customer.name

using a multi value param and want my report to have follow params

@fromdate
@todate
@Name (from report not from proc)

I created @Name param but the dropdown doesn't show the options at all.

How do I map these.

Thanks for the help.