Ezdok problems with PMDG 737 NGX

Hello.

I've recently reinstalled FSX and the PMDG 737 NGX yesterday, along with ezdok. However, after using the EZCA (as administrator) config tool and checking my cfg several times, I can't the cockpit to work properly. I can only see the 2D-cockpit, and when I try to change views, it sometimes goes over to the 3D-cockpit, or just stays in the 2D-cockpit. Has anybody else encountered this problem and know how to fix this? I'm losing hope, so to speak.

Thanks in advance, guys and gals! 

EDIT: I'm also using windows 8.1.