Extending CMP

I want to build a project without too many types of bean. How can I put my own business methods into CMP, I have tried but when i used client to test it return a error ( it recommend that i have to create that method after one home interface )
[250 byte] By [SONTNa] at [2007-10-2 0:31:11]
# 1
http://www.theserverside.com/books/masteringEJB/index.jsp
Annie.a at 2007-7-15 16:45:47 > top of Java-index,Enterprise & Remote Computing,AVK Portability...