Expression on hidden property

I have param named Direction i would like to put

on the hidden property of image this expression

iif(Parameters!Direction.Value = "ascending" ,False ,True)

But i've got error message

.....my expression is not avalid value.

why?

Hi, didn't you miss the "=" as in :

=iif(Parameters!Direction.Value = "ascending" ,False ,True)

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Maybe?

Can you please write me the correct form you think it should be?

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It′s like a said before...

=iif(Parameters!Direction.Value = "ascending" ,False ,True)

if everything's ok that should hide your image when the Parameters!Direction.Value is "ascending" and show it otherwise.

|||Thanks, work grate :)