J2EE Engine Debugging ... Help required

<b>There is a problem with the debugging my J2EE applications. I am a new user on SAP Portals. I set the server parameters through the config tool for setting the debugging of the server. But when I opened the Netweaver, it was still showing me the "Debug Mode Off". When i tried to set the problem from the preferences --> J2E Engine by selecting remote installation, it gave me the error "No server was defined under
sapmnt\.. Configure your server as Remote host"... I tried a lot but could not get through this problem.

I have a portal installation having a URL "http://kashruq:50000/". Earlier I had set the IP Address for my network card as 10.10.1.10 but later removed it and set the etc\hosts file accordingly. The J2EE server is running fine and the sample Car rental Application is also running fine, but I am unble to debug my J2EE applications, if I need to. Any body help me ?</b>