Here's a simple example; the textpos
package was used to place the blocks at desired locations:
\documentclass{beamer}
\usetheme{Frankfurt}
\usepackage[orientation=landscape,size=a0,scale=1.4,debug]{beamerposter}
\usepackage[absolute,overlay]{textpos}
\setlength{\TPHorizModule}{1cm}
\setlength{\TPVertModule}{1cm}
\title[A simple poster]{An example of the \texttt{beamerposter} package}
\author{The Author}
\institute{Thye Institute}
\date{\today}
\begin{document}
\begin{frame}[t]
\begin{textblock}{110}(5,3)
\centering
\maketitle
\end{textblock}
\begin{textblock}{110}(5,20)
\begin{block}{A test block}
Some test text.
\end{block}
\end{textblock}
\begin{textblock}{110}(5,25)
\begin{columns}
\column{.32\textwidth}
\begin{block}{A test block}
Some test text.
\end{block}
\column{.32\textwidth}
\begin{alertblock}{A test alert block}
Some test text.
\end{alertblock}
\column{.32\textwidth}
\begin{exampleblock}{A test example block}
Some test text.
\end{exampleblock}
\end{columns}
\end{textblock}
\end{frame}
\end{document}
There are other alternatives for your posters such as tikzposter
.
beamerposter.sty
installed in your machine?