Second time should pick first value parameter SSRS

Hi Experts,

I have an issue with parameters. I was developing the report from the Cube by using MDX Code

So I was passing four parameters 

1)Date

2)Product category

3)Product Subcategory

4)Products

So when I was selecting  product category then related Product Sub was displaying and then when I was selectingProduct Subcategory then related Products were displaying. 

So Initially I was passing default values for all of them.

My Question is when I run first time it will take default values it is fine !!!!

when I run second time by default it should always pick the first value of each parameter(Product category,Product Sub,Product)

is this possible ?

Any one does have an idea please share with me

Thanks,
RK