[D852] Rear Camera doesn't work with custom ROMs

Hey guys, I'm having some issues with my rear camera in custom ROMs.
I've tried AOSP, XenonHD, and Fulmics, and they all let me use the front camera, but I can't switch to the back camera. When I'm using the stock MM ROM I have no problems.
I am using the Fido D852.
Thanks in advance.