pstrick를 이용해 도형을 작성하는 중 다음과 같은 오류가 발생했습니다. 원인을 진단해 주실 수 있을까요?

(c:/usr/texlive/2011/texmf-dist/tex/latex/kotex-base/utf/lucutbt.fd)

./test.tex:16: Undefined control sequence.

l.16 \scalebox

              {1} % Change this value to rescale the drawing.

?

===============

% projectmain = first.tex

\documentclass[article,a4paper,openany]{memoir}

\usepackage{kotex}

\begin{document}

\title{KC2008Plus 설치 후 첫 예제}

\author{KTUG Collection Team}

\maketitle

% Generated with LaTeXDraw 2.0.8

% Tue Feb 19 14:38:34 KST 2013

% \usepackage[usenames,dvipsnames]{pstricks}

% \usepackage{epsfig}

% \usepackage{pst-grad} % For gradients

% \usepackage{pst-plot} % For axes

\scalebox{1} % Change this value to rescale the drawing.

{

\begin{pspicture}(0,-3.44)(6.88,3.44)

\pscircle[linewidth=0.04,dimen=outer](3.44,0.0){3.44}

\pscircle[linewidth=0.04,dimen=outer](4.48,-0.4){0.82}

\usefont{T1}{ptm}{m}{n}

\rput(2.8485937,1.29){test}

\end{pspicture} 

}

\end{document}