# Mathematica Error Message using CylindricalPlot3D

I have a full version of Mathematica Home Edition 9 installed on a high end desktop. I'm trying to learn how to use it and keep coming up with an error message that I cannot figure out.

I want to plot a 3D graph in cylindrical coordinates. I thoroughly know calculus 3, so the math isn't the problem. The problem is figuring out what I'm doing wrong in Mathematica. I searched many websites and found that I need to load a graphics package called ParametricPlot3D in order to get the graphics routines necessary. I copy and pasted the exact commands, and I still get the error message. Below is an exact copy & paste of what I typed and what error I got from Mathematica. Can anyone please guide me to correct this?

Needs["GraphicsParametricPlot3D"]

CylindricalPlot3D[ 9 - r^2, {r, 0, 3}, {theta, 0, 2*Pi}]

Get::noopen: Cannot open GraphicsParametricPlot3D.

Needs::nocont: "Context \!$$\"GraphicsParametricPlot3D\"$$ was not created when
Needs was evaluated. "


I have also tried a different way to load the graphics routines, and here's the message I'm getting:

<< GraphicsParametricPlot3D

CylindricalPlot3D[ 9 - r^2, {r, 0, 3}, {theta, 0, 2*Pi}]

Get::noopen: "Cannot open \!$$\"GraphicsParametricPlot3D\"$$. "


I realize that the character was missing from the ends of theGraphics statement, but this text editor won't let me put one at the end and keep that same character at the beginning. Trust me, it is there.

I suspect it might be some sort of setting I have to enable, or maybe a directory path that is incorrect, or even I need to download graphics routines. If someone can point me in the right direction, I'd be truly grateful.

-

The functionality of the old CylindricalPlot3D is included in the built-in RevolutionPlot3D
RevolutionPlot3D[9 - r^2, {r, 0, 3}, {θ, 0, 2*Pi}]

This is in the documentation here (I found it by highlighting CylindricalPlot3D` and pressing F1).