安装问题

安装进行到第二步时,提示
Error 500--Internal Server Error
java.lang.NullPointerException
at com.jivesoftware.forum.util.XMLProperties.getProperty(XMLProperties.java:83)
at com.jivesoftware.forum.JiveGlobals.getJiveProperty(JiveGlobals.java:243)
at com.jivesoftware.forum.JiveGlobals.loadLocale(JiveGlobals.java:290)
at com.jivesoftware.forum.JiveGlobals.getLocale(JiveGlobals.java:129)
at jsp_servlet._admin._setup.__setup2._jspService(__setup2.java:230)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1053)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:387)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:305)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6310)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:317)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3622)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2569)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)


救命啊,快郁闷死了:-(

环境是wbl8.1

另外,一个数据库的问题
在windows的服务项里面启动mysql的时候提示找不到可执行文件的路径(属性里面没有路径),所以一直没有办法启动mysql,我把mysql删除了一遍,重新装,还是不行,这个问题怎么解决啊,救命啊,55555555555