Output of my fuzzy controller is constant even when the ruleviewer block shows otherwise

I am using a fuzzy controller in my simulink model and am using the block with rule viewer. When I simulate the system for any length of time, for some reason the out is the initial default value of the controllers for all time. I can see in ruleviewer that the output is being changed as the simulation proceeds but the actual output is constant. Help would be appreciated

I have the same problem! Maybe it is a bug :-|