workitemchanged delegate is not getting binded in kanban boards since it is implemented using custom controls.

For TFS Web access :I should not allow parent items to done until the children items are done. I got some article info from codeproject.com and incorporated some changes and it got worked using jquery API. But these changes are not working on the Kanban board since the code relies on work item changed event and the event delegate is not binded until the work item is explicitly opened. Because it is not triggerred when we are changing the bug states in kanban board. So I am thinking how to make it work.