--- a/Slides/document/root.beamer.tex	Thu Dec 06 16:30:57 2012 +0000
+++ b/Slides/document/root.beamer.tex	Mon Dec 10 21:27:22 2012 +0000
@@ -1,4 +1,4 @@
-\documentclass[14pt,t]{beamer}
+\documentclass[dvipsnames, 14pt,t]{beamer}
 %%%\usepackage{pstricks}
 
 \input{root.tex}