I am new to Cocoon?Anyone can help me?

[myzdf]

I am new to Concoon, when i follow the instanll document to install cocoon with resin 1.3.b1,i catch this exception:   ERROR   (2002-05-22) 12:37.56:537   [access] (/cocoon/) tcpConnection-6802-6/CocoonServlet: Problem with servlet org.apache.cocoon.ProcessingException: Error compiling sitemap: java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.         at org.apache.cocoon.sitemap.Handler.run(Handler.java:295)         at java.lang.Thread.run(Thread.java:484)   I would not use xwindow,How can i remove the component about this?