在eclipse3.2下面tomcat启动报错有关问题

在eclipse3.2下面tomcat启动报错问题
2007-2-27   9:20:48   org.apache.coyote.http11.Http11Protocol   init
信息:   Initializing   Coyote   HTTP/1.1   on   http-8080
2007-2-27   9:20:48   org.apache.catalina.startup.Catalina   load
信息:   Initialization   processed   in   2422   ms
2007-2-27   9:20:48   org.apache.catalina.core.StandardService   start
信息:   Starting   service   Catalina
2007-2-27   9:20:48   org.apache.catalina.core.StandardEngine   start
信息:   Starting   Servlet   Engine:   Apache   Tomcat/5.0.28
2007-2-27   9:20:48   org.apache.catalina.core.StandardHost   start
信息:   XML   validation   disabled
2007-2-27   9:20:48   org.apache.catalina.core.StandardHost   getDeployer
信息:   Create   Host   deployer   for   direct   deployment   (   non-jmx   )  
2007-2-27   9:20:48   org.apache.catalina.core.StandardHostDeployer   install
信息:   Processing   Context   configuration   file   URL   file:D:\Tomcat   5.0\conf\Catalina\localhost\balancer.xml

出现错误Source   not   found   for   StandardContext.start()   line:   4151

但是单独启动tomcat却是正常的,请教各位大侠这是什么问题?

------解决方案--------------------
eclipse没有任何插件,那又怎么会有TOMCAT呢??安装好tomcatplugin插件工具栏会出现TOMCAT菜单,配置windows-> preferences-> tomcat选项 设定tomcat基本项-> 版本、tomcat地址 还有JVM。windows-> customize perspective-> commands中tomcat项勾选上 就会出现3只小猫眯了 。