Im having the same issues as Vety.
I guess I'm basicly still lost. There are a ton of links to Ender's client and I can't tell what is the current version. I downloaded the x32 client from odditown. I've editied the run.bat file to this:
start C:\~\jre\bin\javaw -Xms256m -Xmx512m -jar haven.jar moltke.seatribe.se
pause
The tilda is a replacement for the personal named folders where javaw is located, so isn't really in run.bat.
When I click run.bat the screen blinks and then shows a DOS window where the pause has happend. Pushing any key closes the DOS window and nothing further happens. It never shows me a log in screen. Help?