I get "Failed to authenticate principal=admin, securityDomain=jmx-console" when I try and start JBoss within JBDS.

Issue

JBDS version: 2.0.0.GA
Hi, I have not worked on my jboss studio for months. Just when I wanted to resume my work on jboss yesterday. I found I cannot even start my jboss server. It asks me server credential which I don't remember I've ever set up. It says "Your server is responding to JMX inquiries with a Security Exception...."
The same issue also happened when I try to deploy my project, it showed:

Failed to authenticate principal=admin, securityDomain=jmx-console