The relevant error in this trace is
03 Feb 2006 10:47:36,523 ERROR DbSchema : Exception loading schema from metadatacore
org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Connection refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.)
My guess is that tomcat came up before the postgres service. Try stopping the tomcat service, make sure posgres is running, then restarting the tomcat service.
I can see how this would be an issue when running both servers on the same machine. If you're up for it, you might look into making the tomcat service "depend" on the postgres service. This can be done on the Dependencies Tab of the Properties dialog in the Windows Services Manager.