Upgraded SSRS 2005 to SSRS 2008 - Can't find Group Visibility Properties

I have upgraded my reports successfully from SSRS 2005 to SSRS 2008. In all my table reports I have a detail group and parent group. The detail group is hidden and the visibility is toggled by a column in the parent group. Pretty simple. After the upgrade when I go in SSRS 2008 to see the visibility property in the property window, nothing is set. In SSRS 2005 is easy to see where I set that up. I select the entire detail row and then go to the property window to set the visibility property. In 2008, following the same steps I don't see the visibility peroperties that I set. Yet, when I preview the report the visibility property works as set back in SSRS 2005. I just can't see the property in the property window. When I opened the rdl file with notepad I saw the section about the visibility property and the toggle item. But it bothers me that I can't see it through Visual Studio 2008. I need to change that property for many reports so I'd appreciate any help that would make that property visible through the GUI.