without doing my layer 3d in after effct my layer not showing up

[vivek31172491yrld]

when i open why after effect my screen showed black but when i change why screen front to active camera my solid layer showed up but its  not showed up in front camera but when i do my layer or convert it in 3d layer showed up ?? why this is happening  

[Rick Gerard]

2D layers to not show in the Left, Right, Top, Bottom, Front, Back, or Custom views. They only show in a Camera or the Active Camera view. Only the Active Camera view will render. I do not see any problems or unexpected previews in your screenshot.