detectMultiScale function Problem

I am facing weird problem, I did Face tracking program in OpenCV 2.4.10 , I used CascadeClassifier where to detect face it calls detectMultiScale funtion, this function fills vector of coordinate of detected face.

I Import this FaceDetect class into my Openframework Application by v7.4. Application works very well on my PC.

When I run separate OpenCV program on other machine it works fine.

On Other PC scenario,

Openframework app loads resources and run success, Every function get called from FaceDetect class Camera opens successfully…It loads Haar files Success but

but it return NULL vector from detectMultiScale function on other PC.

I copied all required OpenCV dll in Openframework application.

I am unable to find solution for this problem.

Anyone have Solution on this Problem? Thanks