Can I hide a column(s) based on drill down?

Hi,

Can I hide the 'Applydate and EntryDate' columns until my users hit the (+) to drill down?

I tried going in and selecting the column, then hide (when initially run) then I selected 'display can be toggled by this report item.

BUt no matter which textbox or value I choose I always get the error:

"toggle items must be text boxes that share the same scope"

I have four parameters - not sure if that matters.

Here's a pic:

So I don't want my users to see the two right columns on the right until they hit the 'Description' drill down.

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qeqw