Added weapon not "pitching"

[Panama Red 22]

I need some help please. I have added a new weapon and it shows up and functions perfectly. the problem that I have is getting it to "look" correct.

 

Using the weapons AttachmentAngles=0.0 (yaw), 0.0 (pitch), 0.0 (roll) defination, I can get the weapon (a machinegun) to Yaw (x), and Roll (z), but what I really want it to do is Pitch and it will not pitch no matter what number (positive or negative) I put into the "pitch" location ???

 

Can anybody help me and tell me why it is not "pitching" when the weapon will "yaw or "roll", but not "pitch" ???