PowerPoint activeX control displays BIG RED X

[nibir.mistry]

I have made a user control using c#.net and made the control as COM interop along with COM visible true. It built & registered by "regasm" successfully. My control is visible in power point 2010 under "More Controls" option and can able to add it in slide. The problem is after embedding the control in slide (in design time) a big red color "X" sign displays inside the control (and rest background is white) instead of the actual visual appearance of User Control. but when i start slide show, the User Control displays its own interface (GUI) and when i stop slide show again the interface disappear & display red "X" sign. This User Control works fine with previous versions of MS Power Point (2007/2003/XP). This BIG RED "X" problem is happening with MS Power Point 2010. How do I correct this problem??


Office Version: Office 2010
ProgramowerPoint
Operating System:Windows XP
Visual Studio : 2008
Working Framework : 3.5

Using Language : C#



Regards

Nibir Mistry