weblogic部署ejb部署不上去

weblogic8.1要升到weblogic10.3

之前8下部署ejb可以 现在直接部署到10.3下不成功

An error occurred during activation of changes, please see the log for details.
Exception preparing module: EJBModule(scejb) Unable to deploy EJB: /weblogic/user_projects/domains/yxgl_domain/servers/yxglserver4/stage/scejb/scejb from scejb: [EJB:015025]Unable to load a class specified in your ejb-jar.xml: com.cattsoft.sc.service.ejb.AgentLevelSVRBean. 
Substituted for the exception weblogic.ejb.container.deployer.DeploymentDescriptorException which lacks a String contructor, original message - [EJB:015025]Unable to load a class specified in your ejb-jar.xml: com.cattsoft.sc.service.ejb.AgentLevelSVRBean.


请大拿告诉下 我应该修改哪些文件可以

8.1升到10.3你JDK应该有换吧。最近小弟我也需要升级weblogic版本。也遇到了JDK问题。还不清楚10.3能不能支持JDK1.5