Bukkit

What steps will reproduce the problem?
1. Update your server to the latest craftbukkit build (1.5.1)
2. Put any DwDNPC build (dev, stable, whatever) in the plugins folder
3. Run server

What is the expected output? What do you see instead?
I would expect to see in the logs the plugin enabling and then to enable correctly and to have the other plugins enable as well. What actually happens is half the plugins enable, then DwD comes up, and it freezes for 5-7 seconds and then stops the server.

What version of the product are you using?
Any build I've tried either gives me an error which renders the plugin useless (it still enables) or stops my server.

Do you have an error log of what happened?
I can get one for 1.4.7 and below builds. I tried those just to see if they'd work.

Please provide any additional information below.
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Same happens to me dwdminecraft FIX THIS!