it looks like P3D 4.5 HF2 does no longer understand FixedLatitude and FixedLongitude in decimal notation - it has to be hemispheric (N/E/S/W prefix)
A camera that has decimal lat/lon will end up at the default coordinates 0.0, 0.0 when called up in the sim.
The spec still lists both options though (Learning Center -> SDK -> Cameras -> Camera Configuration)
Best regards-90.0 to 90.0
Latitude values can be expressed in decimal (-90 to +90) or hemispheric (N90 to S90) notation.