B9030 Sat Nav + Camera - Big Problem

[TomPL]

Hi I have a big problem and need help.

I have bought two chinese cameras (NTSC and PAL) to fit in my auris with b9030 sat nav. We have attached all cables correctly (two wires with image to sat nav, two with 12v voltage to the rear gear light). Unfortunately the sat nav does not show anything when I launch the rear gear - I mean it works the same like it worked without the camera. All sensors (speed, REV and GYRO are attached to the sat nav and work correctly).

Anyone knows what can be wrong?

Someone told me that it is possible to attach chinese cameras to older sat navs like b9010 and the newer ones like b9030 or HDD in RAV4 have something that blocks aftermarket cameras - making only OEM ones work fine. Can this be possible?

Maybe someone attached an aftermarket camera to B9030?