求求你讲一讲，这个错误事什么意思，该怎么改正啊！！！

编译一个ejb的程序

"aaa.ejbgrpx": <2002-1-29 下午01时19分55秒> <Error> <EJB> <EJB Deployment: aaabean has a class aaabean which is in the classpath. This class should only be located in the ejb-jar file.>
"aaa.ejbgrpx": <2002-1-29 下午01时19分55秒> <Error> <EJB> <EJB Deployment: aaabean has a class aaabeanHome which is in the classpath. This class should only be located in the ejb-jar file.>
"aaa.ejbgrpx": <2002-1-29 下午01时19分55秒> <Error> <EJB> <EJB Deployment: aaabean has a class aaabeanRemote which is in the classpath. This class should only be located in the ejb-jar file.>
"aaa.ejbgrpx": ERROR: Error from ejbc: ERROR: The classes which ejbc generated from your home and remote interfaces cannot be loaded. Please ensure that you have set the -d option to a writeable directory.
"aaa.ejbgrpx": ERROR: ejbc found errors

我想可能是配置错误，又不知道从河下手！