Why camera.projectionMatrix not working in landscape mode for windows phone 8

Hello,

I configured the orientation of my project as landscape, it work in android but it remains in portrait orientation in wp8 .See the code below:

 Camera.main.projectionMatrix = Matrix4x4.Ortho (-orthographicSize * aspect, orthographicSize * aspect, -orthographicSize, orthographicSize, camera.nearClipPlane, camera.farClipPlane);

Plz Help.......