Thanks for the reply Josh!
I have "2.1.1703.0" installed on the cluster. The HPC SP1 link seems to be broken (Top Picks section on the right of the page http://www.microsoft.com/hpc/en/us/default.aspx)
yeah...I already tried job modify with my username/password...but it still doesn't go through...the username and password is already set to the correct value.
Any other suggestions related to credentials? I think credentials are working fine because of the fact that when I right click on the job and click Submit, it asks me for username/password and submits the job.
Prashant