HELP!!! JRUN JSP 500 Error

Hello, I am having a problem, when i comment this line of code, it
doesn't get the 500 error.

PictureFileScanner pics = new PictureFileFolderScanner(/*
thisfilefolder + */"/images");

But when I have it, I get the ugly error (I copied from the JRUN logs
below)
the definition is this:
 public PictureFileFolderScanner(String scanDirectory) throws
IOException

which calls this
   public PictureFileFolderScanner(File scanDirectory) throws
      IOException
   {
      if (scanDirectory.isDirectory()) {
         this.scanDirectory = scanDirectory;
      }
      else {
         throw new IOException("Not a directory \"" + scanDirectory +
"\"");
      }

      filter = new PictureFileFilter();
      rescan(); //upon creation of an image
   }

and here is the rescan() method....

   /**
    * This method scans the directory and appends the list of files
    * to lastPictureNames, depending on what was passed into the
constructor.
    */
   public void rescan()
   {
      aryPictureList = new ArrayList();

      File[] allPictureFiles;
      allPictureFiles = scanDirectory.listFiles(filter);
      for (int i = 0; i < allPictureFiles.length; ++i) {
         try {
            aryPictureList.add(new
PictureFile(allPictureFiles[i].toString()));
         }
         catch (IOException e) {}
      }
      java.util.Collections.sort(aryPictureList);
   }

07/24 17:49:42 error (class:
jrun__blooddrive__temporarytesting__photoalbum__index2ejsp31, method:
_jspService signature:
(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V)
Incompatible object argument for function call
java.lang.VerifyError: (class:
jrun__blooddrive__temporarytesting__photoalbum__index2ejsp31, method:
_jspService signature:
(Ljavax/servlet/http/HttpServletRequest;Ljavax/servlet/http/HttpServletResponse;)V)
Incompatible object argument for function call
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
    at java.lang.Class.getConstructor0(Unknown Source)
    at java.lang.Class.newInstance0(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at jrun.jsp.JSPEngine.reloadPage(JSPEngine.java:881)
    at jrun.jsp.JSPEngine.loadServlet(JSPEngine.java:862)
    at jrun.jsp.JSPEngine.getServlet(JSPEngine.java:741)
    at jrun.jsp.JSPServlet.service(JSPServlet.java:115)
    at jrun.servlet.ServletInvoker.invoke(ServletInvoker.java:91)
    at jrun.servlet.JRunInvokerChain.invokeNext(JRunInvokerChain.java:42)
    at
jrun.servlet.JRunRequestDispatcher.invoke(JRunRequestDispatcher.java:249)
    at
jrun.servlet.ServletEngineService.dispatch(ServletEngineService.java:527)
    at
jrun.servlet.jrpp.JRunProxyService.invokeRunnable(JRunProxyService.java:204)
    at
jrunx.scheduler.ThreadPool$ThreadThrottle.invokeRunnable(ThreadPool.java:457)
    at jrunx.scheduler.WorkerThread.run(WorkerThread.java:66)