BI server 5.0.1 CE : 404 error but no error messages !!

Hi everyone,

I installed biserver ce 5.0.1 on Windows7 64bit machine and am trying to change database to Postgresql9.2.
After changing pentaho\biserver-ce\tomcat\webapps\pentaho\META-INF\context.xml as below, "HTTP Status 404" error happened and somehow there is no error message in any log at all!

This change is because I've gotten an error that there is no "information_schema.system_sequences".

<<context.xml before>>
validationQuery="select count(*) from INFORMATION_SCHEMA.SYSTEM_SEQUENCES"

<<context.xml after>>
validationQuery="select 1"

Moreover even I use start-pentaho-debug.bat or, OMG, even taking it back to unmodified version, still no error messages.
catalina.2014-10-19.log is as below;
------------------------------------------------
10 19, 2014 1:49:34 pm org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre7\bin; (...omitted by I.)
10 19, 2014 1:49:34 pm org.apache.coyote.http11.Http11Protocol init
INFO: Initializing Coyote HTTP/1.1 on http-8080
10 19, 2014 1:49:34 pm org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 663 ms
10 19, 2014 1:49:34 pm org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
10 19, 2014 1:49:34 pm org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/6.0.36
10 19, 2014 1:49:34 pm org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory pentaho
10 19, 2014 1:49:36 pm org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory pentaho-style
10 19, 2014 1:49:36 pm org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory ROOT
10 19, 2014 1:49:36 pm org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory sw-style
10 19, 2014 1:49:36 pm org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
10 19, 2014 1:49:36 pm org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
10 19, 2014 1:49:36 pm org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/30 config=null
10 19, 2014 1:49:36 pm org.apache.catalina.startup.Catalina start
INFO: Server startup in 1570 ms
------------------------------------------------

Does anyone have the same situation? What should I do next? Any kind comments are so appreciated!

Thank you,