Transparent Background UserControl/Custom DoubleBufferedPanel in WinForms causing tearing issues

I am creating a WinForm dialog in my application in which I render a tree. The main dialog contains of a custom DoubleBufferedPanel (which inherits from Panel but with DoubleBuffering set to true), and custom user defined controls, which have a transparent background as well. I 'removed' the scrollbars on the panel, and made it draggable, so you can drag yourself around the family tree. But when dragging I have a lot of tearing in both panel and user controls and its driving me crazy. Is there anyone here that might want to help me solve this?