Hello Maxim, I tested yesterday the OM 2.2 build 24 with debian wheezy and postgresql 9.3 based on OM install instructions for wheezy: https://cwiki.apache.org/confluence/download/attachments/27838216/Installing+OM2.1.1+on+Debian64+Wheezy.pdf?version=1&modificationDate=1380291632000
For Postgresql with 9.3 I added in the file /etc/apt/sources.list the following line: deb http://apt.postgresql.org/pub/repos/apt& wheezy-pgdg main And I installed the postgres packages with: apt-get install pgdg-keyring apt-get install postgresql postgresql-9.3 postgresql-client postgresql-client-9.3 postgresql-client-common postgresql-common postgresql-doc postgresql-doc-9.3 postgresql-contrib-9.3 OM version 2.2 build 24 running on postgresql works as expected. ;-) But I took the latest postgresql jdbc connector for running OM with the postgres server: cd /usr/adm wget -c http://jdbc.postgresql.org/download/postgresql-9.3-1100.jdbc4.jar cp /usr/adm/postgresql-9.3-1100.jdbc4.jar /usr/lib/red/webapps/openmeetings/WEB-INF/lib And I removed your version of postgresql jdbc connector. Maybe you can replace these connector some time, for people who wants to use the latest version of postgres? See also for details here: http://jdbc.postgresql.org/download.html Thanks & greetings, Michael