Can't activate Collapsible frame in VC 7.0

Hi all,

I want to activate collapsible frame in iviews of a layer. the user wants to collapse/expand iviews. I installed VC 7.0 SP18. But it doesn't work. On the configuration element settings of iview, the checkbox "Collapsible frame" is always light gray. So I can't activate it.

Does anyone has any idea ?

Thanks.

Yigit.