Interesting. I use Linux but have a Win XP box at work and set up Org-mode
for a co-worker so that I would know how to set it up on Windows for him. I
didn't have any trouble, actually.

I just put:
(setq org-ditaa-jar-path "C:/Program
Files/emacs23/org.git/contrib/scripts/ditaa.jar")

and

(org-babel-do-load-languages
 'org-babel-load-languages
 '((ditaa . t)))

in init.el and all worked fine. One thing you might try is running ditaa
right from the command line. I haven't done this on Windows, but the Linux
command would be:

Make the file "ditaa.txt" and copy this into it (from
http://ditaa.sourceforge.net/):

    +--------+   +-------+    +-------+
    |        | --+ ditaa +--> |       |
    |  Text  |   +-------+    |diagram|
    |Document|   |!magic!|    |       |
    |     {d}|   |       |    |       |
    +---+----+   +-------+    +-------+
        :                         ^
        |       Lots of work      |

+-------------------------+

Save the file and run "java -jar /path/to/ditaa.jar ditaa.txt" and see what
happens.

If it works, something's goofed with the org-mode setup. If it doesn't work,
something else is goofy.

Sorry I can't help more!
John


On Fri, Sep 24, 2010 at 6:41 PM, Markus Heller <hellerm2@gmail.com> wrote:

> Hello everyone,
>
> this might be a little OT, but I'm having a hard time to get ditaa to
> run properly.  The org-mode part works, it's the Java part that's giving
> me trouble, I'm getting loads of "Exception in thread "main"
> java.lang.misc stuff goes here" errors, and I have no Java experience
> whatsoever.
>
> I'm on a windoze XP box, and I was wondering if a fellow user might be
> willing to share his/her set-up.
>
> Thanks and Cheers
> Markus
>
>
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