Initial State of Navigation Panel

Hi all,

I have an issue with an SAP portal ivew linked to a guided procedure. When the user clicks on it the navigation panel on the left is closed. We have to tried to set the proposerty "Initial State of Navigation Panel" to "Open" but it did not work (although we tried another iView and it did work). Can you please indicate what could be the possible reason for overriding this property? Thank you in advance.