Doepfer

I have built myself a cabinet for my doepfer modular.Two powersupplies 
(one psu II and one PSU I) have to supply the power for the modules. 
After connecting all modules with the busboards and PSU some modules 
won`t work. When I put these modules in my G6-case they work as they 
should.
I noticed that in my self-made cabinet the PSU`s only give +12v (the 
LEDs of -12v on both PSUs and on the busboards don`t light up). Opposed 
to the G6-case.

I think I connected the busboards to the PSU as it should be.

It`s strange that it happens on both PSU`s.

Does anyone know what the problem might be (as I`m no technician)?