diff --git a/src/main/java/net/sourceforge/plantuml/servlet/ProxyServlet.java b/src/main/java/net/sourceforge/plantuml/servlet/ProxyServlet.java
index 6761209..215d2ed 100644
--- a/src/main/java/net/sourceforge/plantuml/servlet/ProxyServlet.java
+++ b/src/main/java/net/sourceforge/plantuml/servlet/ProxyServlet.java
@@ -61,7 +61,7 @@ public class ProxyServlet extends HttpServlet {
     @Override
     public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
 
-        final String fmt = request.getParameter("format");
+        final String fmt = request.getParameter("fmt");
         final String source = request.getParameter("src");
         final String index = request.getParameter("idx");
         final URL srcUrl;
@@ -79,7 +79,6 @@ public class ProxyServlet extends HttpServlet {
 
         // generate the response
         String diagmarkup = getSource(srcUrl);
-        System.out.println("getSource=>" + diagmarkup);
         SourceStringReader reader = new SourceStringReader(diagmarkup);
         int n = index == null ? 0 : Integer.parseInt(index);
         List<BlockUml> blocks = reader.getBlocks();
@@ -87,7 +86,7 @@ public class ProxyServlet extends HttpServlet {
         Diagram diagram = block.getDiagram();
         UmlSource umlSrc = diagram.getSource();
         String uml = umlSrc.getPlainString();
-        System.out.println("uml=" + uml);
+        //System.out.println("uml=" + uml);
 
         // generate the response
         DiagramResponse dr = new DiagramResponse(response, getOutputFormat());