Cannot Save Forms

I followed the instructions at http://wiki.orbeon.com/forms/doc/developer-guide/admin/installing#TOC-Installing-on-your-application-server 

to install Orbeon on Ubuntu with Tomcat 7.  
Unpacked orbeon.war into the TOMCAT_HOME/webapps/orbeon directory.
added:
<Valve className="org.apache.catalina.authenticator.BasicAuthenticator"
       changeSessionIdOnAuthentication="false"/>

to etc/tomcat7/context.xml

I can access Form Builder, add some controls to a test form.  I can Test and Validate the controls. But when I click the Save button I a dialog box with:

There was an error communicating with the database. Please contact the application administrator.

Any idea what I missed in the installation?

Thanks,
Tim

Hi Tim,

Hard to say without more information. I'd recommend you have a look at the orbeon.log; I hope it will contain an error message that can put you on the right track. If there isn't enough information to tell, try setting the log level as described in the "Development configuration" section:

http://wiki.orbeon.com/forms/doc/developer-guide/xforms-logging#TOC-Development-configuration

And of course, if you can't make up what the error in the log means, feel free to attach it to your response here.

Alex