face detection using viola and jones approach

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C#

good morning pals. Am currently working on face
recognition using viola and jones approach. I think
am a making some silly assumption which ends up
with all classifiers of 100% FALSE negative rate and
0% true positive rate. Here is how i generated my
training features: for all the four feature type@
(face pattern features), i generated different sizes but of equal width and
height for both black and white region. Could this
be the reason behind the poor training result?
Moreso, my threshold for each feature was
arbitrarily chosen to be within a range of value. Am
i getting some things wrong? I wud be so glad if someone could help. Am wasting so much time
over this and exam is nearby. Thanks...