I'm working on an add-in for ArcMap 10.0 in .Net version 3.5. It was finely added in arcgis desktop 10.0 as addin tool and working finely. I added some code in the addin project and build that project again. But At this point, when I run ArcMap and select the tool, the tool is deactivated. In fact, when I put break point on my project and debug it, tool's any method are not called. I wonder, the OnActivate() method is not called either. Even the constructor of the Addin Tool class is not called.
How do I activate my tool now? Why does the tool not call it's constructor or OnActivate() method?