I downloaded quest discussion webpart from this site http://sharepointforall.com/media/p/320.aspx
I configured the quest discussion view webpart like group by category, I can see the data group by category on webpart. When I am trying to delete " one Respose item" from the webpart, am getting an error.
But if I delete the discussion item (header) am able to successfully delete from the same webpart.
Please refer the screen shots in http://sanras.blogspot.com/2010/02/qdiscussionview-free-webpart-error.html
Appreciate if you hlp me to get resolve this issue.