ofxShaderBlur problem

When i try ofxShaderBlur example from
http://forum.openframeworks.cc/t/ofxblurshader-addon/4850/0

i get yellow blurred image with some strange in right-bottom corner.

what wrong

My guess would be that your graphics card doesn’t support the methods used in ofxShaderBlur.

yep
problem was in my video card…
thanks for help