Error upgrading 2.2.4 to 2.3.4

[John McMonagle]

Just tried a test  upgrade of  kolab server from 2.2.4 to 2.3.4.

I made a copy of the server changing host name ip etc.
Then verified it worked.
Upgraded the host from lenny to squeeze.
Verified it still worked.
Downloaded the squeeze binary packages and verified them.
Started the upgrade

root at nmail:/home/kolab-2.3.4# sh install-kolab.sh 2>&1 | tee /root/kolab-
update.log
Changing to temporary working directory /tmp/install-kolab....4739 ...

Kolab installation tag (TAG):       kolab
Kolab installation prefix (PREFIX): /kolab
Kolab version (KOLAB_VERSION):      2.3.4
Kolab user name (USER):             kolab
Kolab user base UID (KID):          19414
Kolab restricted UID (KID):         19415
Kolab non-priviledged UID (KID):    19416
Exclude following Kolab packages:   

Received no instructions. Trying to determine required action...
Found an OpenPKG environment. Assuming upgrade...
----------- SETUP COMPLETED -----------

 Now running:

   /kolab/bin/openpkg build -kKBuZ -r "/kolab/RPM/PKG" -p "ix86-debian5.0-
kolab" -D openldap::with_pth=no -D sasl::with_ldap -D sasl::with_login -D 
sasl::with_ntlm -D postfix::with_sasl -D postfix::with_ssl -D 
postfix::with_ldap -D imapd::with_kolab_nocaps -D imapd::with_crossdomain_acl 
-D
            -Dkolabd::kolab_version=2.3.4
            -Dkolab-webadmin::kolab_version=2.3.4
          openpkg-tools openldap postfix kolabd kolab-webadmin kolab-fbview 
kolab-webclient kolab-z-push | sh

---------------------------------------
:::: /kolab/RPM/PKG/openpkg-20071227-20071227_kolab2.src.rpm ::::
error: cannot open /kolab/RPM/PKG/openpkg-20071227-20071227_kolab2.src.rpm: No 
such file or directory
Installation completed.
/kolab/RPM/PKG now contains the installed packages.
Previous contents were moved to /kolab/RPM/PKG....4739
...................................... 

Do I need to do something else to upgrade from squeeze?

John