Webi Hierarchy custom variable

Hi,

can I create a Variable like a Hierarchy?

the problem I'm having is like

1. I have a custom Input control: Select by "Product" or by "Customer"

The Product is Hierarchy Dimension and Customer is Regular one

I have in my table Dimension a condition:

if selection = "Customer"

then [Customer]

else

[Product]

The problem is, in the table the Product is coming as flat and not as Hierarchy when I'm using the Variable.

If I put normally Product, the hierarchy works perfectly.

Any tricks?

Thans.
Regards.