Problems with multiple instances on FC4

Hello,
i currently have in production rt version RT 3.4.4
i have just gone thru the build process and install for rt-3.8.8

i have two sub domains, once for each installation rt3 for the old and
rtx for the new

I have them both set up as below , when i try to access the original
rt3.mydomain.com, i get the error on the log file
[Wed Jun 09 15:55:55 2010] [error] [Mason] File does not exist:
/home/rt3/share/html/manager/html

to fix this i have to comment out in the new
PerlModule Apache::DBI
PerlRequire /home/rtx/bin/webmux.pl

then of course the new does not work

thanks for any help

this is from my httpd.conf

ServerName rt3.mydomain.com
DocumentRoot /home/rt3/share/html
AddDefaultCharset UTF-8

ErrorLog /var/log/httpd/rt3.com-error_log
CustomLog /var/log/httpd/rt3.com-access_log combined

RedirectMatch permanent (.*)/$ http://rt3.mydomain.com$1/index.html

PerlModule Apache::DBI
PerlRequire /home/rt3/bin/webmux.pl


<Location />
    SetHandler perl-script
    PerlHandler RT::Mason
</Location>
ServerName rtx.xxx.com DocumentRoot /home/rtx/share/html AddDefaultCharset UTF-8
ErrorLog /var/log/httpd/rtx.com-error_log
CustomLog /var/log/httpd/rtx.com-access_log combined

RedirectMatch permanent (.*)/$ http://rtx.mydomain.com$1/index.html

PerlModule Apache::DBI
PerlRequire /home/rtx/bin/webmux.pl

<Location />
    SetHandler perl-script
    PerlHandler RT::Mason
</Location>