Debug an ATL component that crashes in VB6

We have an ATL user control written in VS2013, based on the RichEdit control. The control is meant to work in a VB6 app. The control works fine, except that when I try to show its properties window in VB6, or when I select the component along with another component - VB6 crashes. I need someone to debug this and suggest how to make this work. I can supply the full source code for the ATL component, crash dumps for the crash, and TeamViewer access to the machine on which this crashes. There is absolutely no more information or resources I can supply. I need this work done ASAP. Please, ONLY DEVELOPERS WITH EXTENSIVE KNOWLEDGE AND EXPERIENCE IN C++, ATL AND USER CONTROLS.