Tomcat Installation Problem

Hi,

I just finish installing tomcat using easyapache.

I can browse http:/mydomain.com:8080 and login to admin using the password from tomcat-users.xml.

But I can not using shell to start or stop tomcat.
Even after I add export JAVA_HOME=/usr/local/jakarta/jdk or maybe I just do it incorrectly.

The error is:
<--------------
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine
-------------->

And the result after using "Account Functions >> Install Servlets" also resulting a tomcat page 404 error.

I'm using:

Virtuozzo VPS
WHM 11.11.0 cPanel 11.15.0-C18264
CENTOS 5 i686 - WHM X v3.1.0
Easy::Apache v3.2.0 Build 3344
Apache Tomcat/5.5.25 [Newly installed].
PHP 5.2.4 with Suexec and Zend
Apache 2.2

In my effort to enable the Install Servlet, I also installing:

"Software >> Install a RPM" for "Tomcat Admin-Webapps" and "Tomcat Webapps"

But the result still the same.

Any help ?

Thanks.