Oh, that's an interesting point. It could be tat your toolbox items in VS2008 are pointing to the wrong assembly. So you could run the ToolBox Utility or manually remove and re-add the grid to the toolbox. 

I was experiencing the same issue, I had Infragistics 7.1 and VS2K5, then I installed Infragistics 7.3 (with latest hotfixes v1043) and installed VS2k8 along side VS2K5. When I opened/created projects in VS2K8, infragistics 7.3 controls would not drag and drop onto my page (web). This frustrated me for several days, but I came back and ran the "Create Visual Studio Toolbox Tab" (Start>Programs>Infragistics>NetAdvantage for .NET 2007 Vol. 3 CLR 2.0>NetAdvantage for .NET Tools). Just have to make sure all .NET ENVs are closed.

Hope this helps. Les.

 Hi Kamal,

    I can't see any reason why this would work in VS2005 and not in VS2008. If VS2005 can find the design assembly, then VS2008 should be able to. Is the grid showing up as a component in the component tray in VS2008? Are you sure you are testing with the same version?

    You could try running another instance of Visual Studio and hooking into the process to see which assemblies are loaded. But if you're not sure how to do that, I'm afraid it's a bit more complicated than I can explain here in a forum post. You should probably contact Infragistics Developer Support.

Hi Mike,

I have VS2005 on the same machine and the gird works in this version. But it does not work with VS2008. if it can't find the design assembly, how can i resolve it?

thanks,

Kamal