It looks like some of the pre-requisites are not installed. I would check through all of the products listed in Deployment Manager for any client tools that may not be installed.
Later versions of the SAS Add-in come with their own stand-alone installer which makes it a lot easier, for example 6.1 or 7.1. You could request the latest version from SAS (including EG) as these are compatible with SAS versions back to 9.2.
The SAS Users Group for Administrators (SUGA) is open to all SAS administrators and architects who install, update, manage or maintain a SAS deployment.