3d camera not working in a particular composition.

[#1]

I'm trying to build a animation with building movement like benn tk but the camera in that composition is not working. I've enabled 3d option but still no response. When i go out of that pre comp and apply camera on the outside of the comp it works. Can anyone help me with this problem? 

[#2]

I'm trying to build a animation with building movement like benn tk but the camera in that composition is not working. I've enabled 3d option but still no response. When i go out of that pre comp and apply camera on the outside of the comp it works. Can anyone help me with this problem? 

[#3]

Screenshots of the timneline and composition window, please!

Mylenium

[#4]

If the camera is in the main comp and the 3D layers are in a nested comp (pre-comp), collapse transformations must be turned on.

If you are using Trapcode Particular to generate particles then the layer must NOT be a 3D layer. You'll need to go to RedGiant.com and study up on how to use Particular.

If there is some other problem we need a detailed workflow and screenshots and or a flow chart to figure out where the user error is.