安装tomcat,无法启动。

我安装了tomcat，启动也成功了.但打不开http://localhost:8080,提示无法连到主机.
shoutdown tomcat时，出现以下错误：
Using CATALINA_BASE: /server/tomcat-4.1
Using CATALINA_HOME: /server/tomcat-4.1
Using CATALINA_TMPDIR: /server/tomcat-4.1/temp
Using JAVA_HOME: /opt/jdk
Catalina.stop: java.net.ConnectException: Connection refused
java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:507)
at java.net.Socket.connect(Socket.java:457)
at java.net.Socket.(Socket.java:365)
at java.net.Socket.(Socket.java:178)
at org.apache.catalina.startup.Catalina.stop(Catalina.java:532)
at org.apache.catalina.startup.Catalina.execute(Catalina.java:352)
at org.apache.catalina.startup.Catalina.process(Catalina.java:129)
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.main(Bootstrap.java:156)
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我是个新手，请各位大虾指点一下。

急，在等！！！！！！！！