MUC Service Plugin add/delete user role problem

I was using Chrom's Advanced Rest Client to test the plugin,and I get HTTP/1.1 302 Found, and redirect me to the login.jsp page when I call these two:

1. POST /mucservice/chatrooms/{roomName}/{roles}/{jid}

2. DELETE /mucservice/chatrooms/{roomName}/{roles}/{jid}

and it redirect to login.jsp page with parameters like:

Redirect

To:http://192.168.1.104:9090/login.jsp?url=%2Fplugins%2Fmucservice%2Fchatrooms%2Faa aa%2Fmembers%2Fjjj%40aaa.com.tw%3Fservicename%3Ddiywith status:302HTTP/1.1 302 Found

Anyone out there got the same problem?