about kalman filter (use Matlab functions)

Hello everybody. I'm very new in Matlab. Today I try to design a simple kalman filter but have some problems. When I run my program, 'inner matrix dimension must agree' error occured. And I dont know how to fix this. I upload my simulink below: http://www.mediafire.com/?9wcwl6h1cwl6jx2 http://www.mediafire.com/?ycebwm7zly1tq88 Sorry for my bad english.

[Azzi Abdelmalek]

What is the difference with the question at http://www.mathworks.com/matlabcentral/answers/55629-inner-matrix-dimensions-must-agree-error

[Khoa]

Sorry, it is the same. I will delete that question. But until I set the value for P_old and x_old it still not work.

[Azzi Abdelmalek]

You have not replied neither to Walter' comment neither to my answer!