Open Source Document Management System | OpenKM

hello members Am receiving an application error which seems like this!

Application error
Class: org.apache.jasper.JasperException
Message: javax.servlet.ServletException: com.openkm.core.DatabaseException: Cannot open connection
Date: Wed Apr 15 09:31:13 EAT 2015

am running OPENKM on ubuntu 14.04 LTS 64 bit type.

any one to help me please
THANKS

Stop aplication
remove tomcat/logs/catalina.log file
Start application
Try to login
Zip catalina.log file and attach at this post ( we need to take a look into ).