How to use a cursor in Unity4

I tried to add a 64x64 PNG texture to Cursor image, but it shows nothing, it only shows blank box. like this

[10634-unity±+launcher.unity±+nitroracerxd±+pc,+mac+&+linux+standalone.jpg|10634]

this is the cursor.

Change image format to Truecolor or 16bit.

Select your image and ensure to set it as a Cursor texture from Inspector. Now you can place it in Edit-> Project Settings-> Player-> Default Cursor.

34561-screen2.png