OTRS installation

[mallesh]

Hi,
I am trying to install OTRS 3.0.10 on Cent OS 5.5 Linux .. I installed already OTRS 2.4.9 on the same system in /opt folder..this version is running fine., but i have to install another version of OTRS 3.0.10 on the same system also keep in /opt/., Some changes in apache2-httpd.include.conf & apache2-perl-startup.pl from otrs script folder Some changes in httpd.conf as below:-

OTRS Version2.4.9 = /opt/otrs/
OTRS version3.0.10 = /opt/otrsnew/


ScriptAlias /otrs/ "/opt/otrsnew/bin/cgi-bin/"
Alias /otrs-web/ "/opt/otrsnew/var/httpd/htdocs/"


++++++++++++++++++++++++++++++++++++++++++++++++++

Perlrequire /opt/otrsnew/scripts/apache2-perl-startup.pl


<Directory "/opt/otrsnew/bin/cgi-bin/">
AllowOverride None
Options +ExecCGI -Includes
Order allow,deny
Allow from all
</Directory>
<Directory "/opt/otrsnew/var/httpd/htdocs/">
AllowOverride None
Order allow,deny
Allow from all
</Directory>


but , I am facing some error on run installer.pl

Software error:

Can't locate object method "LoaderCreateAgentCSSCalls" via package "Kernel::Output::HTML::Layout" at /opt/otrsnew/bin/cgi-bin/../../Kernel/Output/HTML/Layout.pm line 1324.

For help, please send mail to the webmaster (root@localhost), giving this error message and the time and date of the error.

..please any one know this error ???

thanks in adavance......