how to click on unrecognized button ( by xy coordinate relative to recognized window)?

ps here is the error ; There are several objects in the system that match the recognition attributes of the "wndFNWND31202" mapped object. This may cause the "Object not found" error. Objects Sys.Process("Tessitura").Window("FNWND3120", "", 1) Sys.Process("Tessitura").Window("FNWND3120", "Tessitura STAGING System Refreshed On: Dec 12 2014 11:23AM. - [Order No : ]", 2) To solve the problem, you may need to modify mapping settings for the "wndFNWND31202" object or one of its parent objects. See Help for more information