also, why are you using cf-polling-amf channel for a remote object? Shouldn't you use the cf-amf one? Also, as Tom said, when you change anything in your configuration, you might want to do a project > clean to be sure that your app uses the latest version of your services-config.xml.
-- João Fernandes http://www.onflexwithcf.org http://www.riapt.org