[texhax] subfigure

[msaghafi]

Thanks to Phill that answered a part of my question.
what is the command any way? where should it go? I know the follwing command 
should work :
\begin{figure}
\subfigure[A graphic]{\epsfig{file=graphic.eps,width=2in}}
\subfigure[A second graphic]{\epsfig{file=nextgraphic.eps,width=2in}}
\label{figure:twographics}
\caption{Two examples of graphics}
\end{figure}

but it gives back an error message to me like undefined control sequence 
<argument>{\epsfig}.....
Any body knows how to solve the problem...?