CEGUI does not cooperate with glOrtho Perspective

[wolek]

I setup opengl with orthogonal perspective:
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();

glOrtho(0,width,0,height,-1,1);

glMatrixMode(GL_MODELVIEW);
glLoadIdentity(); '

and evertyhing what i want is drawed on the screen until i call SchemeManager
#include <RendererModules/OpenGLGUIRenderer/openglrenderer.h>
CEGUI::OpenGLRenderer *renderer = new CEGUI::OpenGLRenderer(0);
new CEGUI::System(renderer);
SchemeManager::getSingleton().loadScheme("TaharezLook.scheme");
after this call only cegui windows are drawed but no opengl primitives.
I am using cegui 0.5 is there some way to use it with glOrtho projection?