求教linux下tomcat启动问题

os: redhat enterprise

jdk版本:1.5.0_07

tomcat版本:5.5.17

在/etc/profile中设定:

export JAVA_HOME=/home/pangm/jdk1.5.0_07

export PATH=$JAVA_HOME/bin:$CATALINA_HOME/bin:$PATH

export TOMCAT_HOME=/usr/apache-tomcat-5.5.17

export BASEDIR=/usr/apache-tomcat-5.5.17

export CATALINA_BASE=/usr/apache-tomcat-5.5.17

export CATALINA_HOME=/usr/apache-tomcat-5.5.17

export CATALINA_TMPDIR=/usr/apache-tomcat-5.5.17/temp

启动tomcat:

[root@ngn1 bin]# ./startup.sh

Using CATALINA_BASE: /usr/apache-tomcat-5.5.17

Using CATALINA_HOME: /usr/apache-tomcat-5.5.17

Using CATALINA_TMPDIR: /usr/apache-tomcat-5.5.17/temp

Using JRE_HOME: /home/pangm/jdk1.5.0_07

[root@ngn1 bin]#

然后就没反应了,请问有哪位大哥知道是什么问题?