LDN - Luminis Developer Network

Hi all

Recently we made the changes of DB hostname on our test luminis system and I made the following luminis properties change:

database.datasource.oracle1.url
database.datasource.oracle1.host

But I kept getting "Technical Difficulty" and "connection refused" error?

The following is from cp.log:
[2010-08-09 13:49:51,685] [ERROR] WebServlet [uportal.bridge]: An exception occurred before authenticating user:
org.jasig.portal.PortalException: failed to get valid RDB connection: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=169870336)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))

Please someone help? Thanks!
Alan