Seam on Linux Problems

When a seam application on JBOSS using java 1,5 is deployed in Unix platform, I am getting this error.

errorjava.lang.NoClassDefFoundError at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:141) at java.awt.G开发者_StackOverflow中文版raphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvi ronment.java:62)

It runs fine on windows platform. On my local linux machine it runs fine. but on another linux machine it works some times and sometimes it throws up the above error

Check at your jboss logs which java version and java vendor are jboss using. Use only SUN Java 5 or IBM Java 5.