myeclips 中启动tomcat出现一下故障，请高手帮我看看到底是怎么回事？
严重: Error starting static Resources
java.lang.IllegalArgumentException: Document base D:\jakarta-tomcat-5.0.28\webapps\balancer does not exist or is not a readable directory
at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:138)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
2008-6-25 18:13:36 org.apache.catalina.core.StandardContext start
严重: Error in resourceStart()
2008-6-25 18:13:36 org.apache.catalina.core.StandardContext start
严重: Error getConfigured
2008-6-25 18:13:36 org.apache.catalina.core.StandardContext start
严重: Context startup failed due to previous errors
2008-6-25 18:13:36 org.apache.catalina.core.StandardContext start
严重: Exception during cleanup after start failed
LifecycleException: Container StandardContext[/balancer] has not been started
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4466)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4371)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
2008-6-25 18:13:36 org.apache.catalina.core.StandardHostDeployer install
信息: Processing Context configuration file URL file:D:\jakarta-tomcat-5.0.28\conf\Catalina\localhost\BIDemo.xml
2008-6-25 18:13:36 org.apache.catalina.core.StandardContext resourcesStart
严重: Error starting static Resources
java.lang.IllegalArgumentException: Document base D:\jakarta-tomcat-5.0.28\webapps\BIDemo does not exist or is not a readable directory
at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:138)
at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:3910)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4138)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)
2008-6-25 18:13:36 org.apache.catalina.core.StandardContext start
严重: Error in resourceStart()
2008-6-25 18:13:36 org.apache.catalina.core.StandardContext start
严重: Error getConfigured
2008-6-25 18:13:36 org.apache.catalina.core.StandardContext start
严重: Context startup failed due to previous errors
2008-6-25 18:13:36 org.apache.catalina.core.StandardContext start
严重: Exception during cleanup after start failed
LifecycleException: Container StandardContext[/BIDemo] has not been started
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4466)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4371)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:823)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595)
at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDeployer.java:903)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216)

at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256)
at org.apache.commons.digester.Rule.end(Rule.java:276)
at org.apache.commons.digester.Digester.endElement(Digester.java:1058)
at org.apache.catalina.util.CatalinaDigester.endElement(CatalinaDigester.java:76)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1567)
at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.java:488)
at org.apache.catalina.core.StandardHost.install(StandardHost.java:863)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:483)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:427)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:349)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:789)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478)
at org.apache.catalina.core.StandardService.start(StandardService.java:480)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313)
at org.apache.catalina.startup.Catalina.start(Catalina.java:556)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425)

[解决办法]
建议重新安装一次Tomcat，然后，重新配置MyEclipse中的tomcat，然后重新运行！
原因我估计有以下两种可能：
1.tomcat安装有误或安装后无意删除或更改了一些文件；
2.MyEclipse中的Tomcat没有配置好（例如：没有正确选择版本、没有正确配置Tomcat的位置、没有配置Tomcat下的JDK）。
其他我也就不清楚了！
[解决办法]
把balancer 项目的web.xml最简化,把与项目相关的内容都去掉,看行得通不,如果可以的话,再一步步加上,直接出错,找到那个出错的配置