Emacs-cvs org-mode and latex fragments

Question

Hi all!
When I try to show latex fragments as images in emacs org-mode i get no error but blank images. The same if I try export to html
Note: I've installed dvipng from sourceforge.net
Thank you all!

Answer 1

I have a furthur issue now that an org file like so:
#+TITLE:Dissertation Data Analysis
#+AUTHOR: Ben J. Ward
#+OPTIONS: num:nil ^:nil f:nil
#+BABEL: :session *R* :results silent
#+LATEX_CLASS: article
#+LATEX_HEADER: \renewcommand*\familydefault{\sfdefault}
#+begin_src R :exports results
evolution <- read.csv(file="~/Evolution Results.csv", header=T)
library("lattice")
#+end_src
* Visualization of Data
** Overall trend in Minimum inhibitory concentration values over time.
#+srcname:fig1
#+begin_src R :results output :exports results :file fig1.pdf
xyplot(MIC.~Challenge, data=evolution)
#+end_src
#attr_latex: width=0.8\textwidth,placement=[p]
#+label: fig:one
#+caption: Fig1. Overall increace in MIC values as challenges continue.
#+results: fig1
[[file:fig1.pdf]]
Results in a blank pdf, other than the title and author, and a .tex file like thus:
% Created 2010-12-11 Sat 21:17
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fixltx2e}
\usepackage{graphicx}
\usepackage{longtable}
\usepackage{float}
\usepackage{wrapfig}
\usepackage{soul}
\usepackage{textcomp}
\usepackage{marvosym}
\usepackage{wasysym}
\usepackage{latexsym}
\usepackage{amssymb}
\usepackage{hyperref}
\tolerance=1000
\usepackage[scaled]{uarial}
\usepackage{babel}
\renewcommand*\familydefault{\sfdefault}
\providecommand{\alert}[1]{\textbf{#1}}
\title{Dissertation Data Analysis}
\author{Ben J. Ward}
\date{11 December 2010}
\begin{document}
\maketitle
\end{document}
Is anyone wise in the working of org and babel that might help me? (I know how to use it, not so much fixing it)
Thanks,
Ben.