How can I change the maxmum degree of slope can be climbed?

Hello,

I'm entirely newbie on OgreNewt.
and now I'm doing my project with Character control.

As I knew, defaut maxslope degree is 30(in the playercontroller class).
and I saw someone's posting that playercontllorer class has maxslope in the parameters.

but when I check my OgreNewtPlayercontroller.h file in OgreNewt\inc directory,
there was only MaxStair height and Kinematic cution in playercontroller's parameter.

What I want is just changing maxmum degree of slope can be climebed.
How can I change?

thanks in advance.