[SOLVED] Why does my LaTeX subfigure not work with an a0poster?

Why does my LaTeX subfigure not work with an a0poster?

Here's my problem. I have a bunch of figures already written in a LaTeX document, and I'd like to reuse them for a poster. The code for the figure looks like:

\begin{figure}[htp]
  \begin{center}  
    \subfigure[Figure A]{\label{fig:Sample-a}\includegraphics[scale=5]{Image1.png}} 
    \subfigure[Figure B]{\label{fig:Sampple-b}\includegraphics[scale=5]{Image2.png}} 
  \end{center}
  \caption{This is my caption!}
\label{LineJustification}
\end{figure}

And it works when I put at the beginning:

\usepackage{subfigure}
\usepackage{graphicx}

When I'm putting together the poster, I'm using the template I've found online at this website, with packages like:

\documentclass[a0]{a0poster}
\pagestyle{empty}
\setcounter{secnumdepth}{0}
\usepackage[absolute]{textpos}
\usepackage[it]{subfigure}

(and I've commented out the graphics, wrapfig, and times packages from the landscape file, just in case they're interfering).

So what gives? Why do I get the following error when I try to put the same figure into the a0poster document? If I don't use subfigures, the file compiles, but then I'd have to rework all of my figures, which would be painful.

!Undefined control sequence
 <argument> if\@captype
              topcap
 I.154  \subfigure 
       [Figure A]{\label{fig:Sample-a}

(I'm using mactex, if that means anything)

Solution

I solved this problem by not using subfigure, but placing the figures explicitly and exactly. Kind of a dirty hack, but the poster went off well.