FXRuby-1.6.19 don't run in ruby1.9.1 on windows.

I built  fxruby-1.6.19 in win32 using msys + mingw tools.
The process of doing it is ok and generate a file fox16.so in the directory ext\fox16.
But when i require 'fox16', it fails to work. it reports that "LoadError: 127.  The specified procedure could not be found . - Init_fox16  C:/ruby_1.9.1/usr/local/lib/ruby/site_ruby/1.9.1/i386-msvcrt/fox16.so ".
how can i resolve it? thanks.

OS: windows
Ruby: ruby 1.9.1p0 (2009-01-30 revision 21907) [i386-mingw32]