VBO + Geometry Shader problem

hi guys

I have made a vbo experiment with geometry shader

simply mix geometryShaderExample+vboExample from examples/gl

http://vimeo.com/60622946

but may i enable the geometry shader . it doen’t draw y and x axis up vector

shader enabled - y and x axis up vector won’t draw
[](http://i.imgur.com/GVfGHFu.png[/img])](http://imgur.com/GVfGHFu)

shader disable - everything draw
](http://i.imgur.com/HRAJWF9.png[/img])