Jboss4.2.3 can not call the servlet

[myroyal]

Dear All:

        I migrate from jboss3.0.6(jdk1.4) to jboss4.2.3(jdk1.5) GA,and most of the application functions  can run . but i am puzzled for a big problem.My application can not call the servlet from applet.  i had used "System.out.println" to export the information in the servlet's init and doget function . The same programe can run well in old enviroment!

What can i do ?

[myroyal]

I have get the answer,it a stupid mistake