Add the second command on Rhino Plugin in C++ SDK for Rhino 5

I build a Rhino Plugin in C++ SDK for Rhino 5. Initially there is a command. However, I want add the second command. I followed guide to use command wizard to generate code and past in .cpp file. The code can be build. However, when I run it. In Rhino 5, I cannot use the second command I build. Software told me that is unknown command. Is there anything wrong with my code. Please give me some suggestion. Thanks!

First run the command that is already known by Rhino. This will load the plug-in. When the plug-in is loaded, Rhino will discover the new command. Then you can run the new command.

It works, Thanks a lot