[Vala] How to debug vala program?

[John - <arenal85 hotmail com>]

I try to debug Vala program with Nemiver : http://projects.gnome.org/nemiver , that It recomends in Debugging 
chapter from http://live.gnome.org/Vala/Tutorial

But It give me this message : "Could not find file test.vala.c" when I try to see what happens in clicked 
button signal.

I use Builder to load the ui file and the connect signal has this code :
[CCode (instance_pos = -1)]
public void on_testButton_activate(Button sender)
{

}



                                          
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