[GtkGLExt] how to solve the errors (gtkglextmm in windows)?

[明覺 <shi minjue gmail com>]

I build a gtkglextmm application in windows vista by mingw and msys,
when I run it, it outputs the error messages:
-----------------------------------------------
(a.exe:1628): GdkGLExt-CRITICAL **: gdk_window_is_gl_capable:
assertion `GDK_IS_WINDOW (window)' failed

(a.exe:1628): GdkGLExt-CRITICAL **: gdk_window_set_gl_capability:
assertion `GDK_IS_WINDOW (window)' failed

(a.exe:1628): GtkGLExt-WARNING **: cannot set OpenGL-capability to
widget->window

**
Gtk:ERROR:gtkwidget.c:7967:gtk_widget_real_map: assertion failed:
(GTK_WIDGET_REALIZED (widget))
--------------------------------------------
and then crashes.

any advice to solve it? thanks

-- 
我的操?系統是Gnu/Linux Debian/gNewSense Gnome Mozilla Gmail/Evolution
Gtkmm/Gtkglextmm Scim Totem Pidgin.