Maya Modeling :: Selecting With Camera Based Selection?

I am using Maya 2012. I am doing a tutorial for Maya 2011. It is directing me to do some selecting and transformation to my mesh using camera based selection. The tutorial says:

1. double click the selection tool icon in the toolbox. the tool settings editor appears.

2. In the common selection options selection underneath marquee, turn on camera based selection.

3. Right mouse click the mesh and select vertex from the marking menu. The vertices appear on the mesh.

4. While looking at the front of the mesh, select the vertices that need to me moved by holding the left mouse button at one corner dragging a marquee selection over them. the vertices should be selected.

I selected the “turn on camera based selection” in the selection icon toolbox settings editor. But I can’t select the veritces using a left mouse click bounding box or by selecting the vertices individually. The vertices just won’t highlight or select. If I want to select I have to turn off the camera based selection.