Information systems use research has investigated post-adoption issues as a means for identifying the factors that are relevant for long term IS success. Our objective in this study is to investigate voluntary adoption decisions of new software in an organizational setting. We study how attributes of prior use, perceived ease of use and perceived usefulness affect knowledge transferability and adoption intention of new software in the same primary base domain. Out study was based in the context of changeover of a course management system at a small Southern University. Data was collected from 81 faculty members about their intention to adopt the new CMS. Results indicate that in the context of voluntary adoption of new software in the same primary base domain, habit and knowledge transferability are positively associated with adoption intention while frequency of feature use is negatively associated.