sorry to re-post this, but the problem still persists. I cannot deploy my WebDynpro application, whether using SDM or from within Eclipse. I get the same message:
"Deployment aborted. Unable to log on to [hostname] with user Administrator. Security credentials insufficient/wrong..."
The error is basically the same as reported by S. Radhakrishnan on October 28, 2003 (Error in deploying first Webdynpro at SDM). The only difference is that for me, deployment doesn't work neither via Eclipse nor via the SDM.
I've installed the SLD, and it seems to work. However, deployment aborts consistently.