Debug console: no printout at all

Hi All,
I'm trying to debug my dissector plugin using debug console http://wiki.wireshark.org/Development/Tips

No g_print nor just printf nor ostream std::cout doesn't work.
Just writing to the file - it works but it's not so useful like console.
What could be the reason ?
Which secret flag should I check ?

I compiled Wireshark 1.9.0 ( svn rev 48261) for Windows,
activated debug console as "Always (debugging)" but I see nothing there !

See the same issue with no answer: http://ask.wireshark.org/questions/11874/debug-console-nothing-displayed

Thanks,
Igor