Web dynpro

I am not able to deploy my files to the server. what are all the necessary configuration changes i have to make to deploy files to my portal server. when i try to deploy the file i am getting an following error

Sep 26, 2005 12:03:33 PM /userOut/deploy (com.sap.ide.eclipse.sdm.threading.DeployThreadManager) [Deploy Thread] ERROR:

MyFirstApp.ear -> Deployment aborted

Reason:

Cannot determine sdm host (is empty). Please configure your engine/sdm correctly !