Thanks Wolfgang. I will check and update as I found that the server has Oracle 804 and not 806 and will see if it works with this unsupported version. Sanjay Wolfgang Breitling <breitliw@xxxxxxxxxxxxx> wrote: You can use the 10.2 listener to service all databases. Listeners are backward compatible. You only need to run 1 listener of the same version as your "highest" Oracle version database. At 08:23 AM 11/29/2006, Sanjay Mishra wrote: >I have three Oracle software in one server 8.06, 817 and 10.2.0.2 >and each one is having one instance running on the server. Do I need >to run three listener for all three Database separately on 3 >different Port or there is any way that I can use one Listener to >take care of all Client request. Regards Wolfgang Breitling Centrex Consulting Corporation www.centrexcc.com ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ --------------------------------- Want to start your own business? Learn how on Yahoo! Small Business.