If you are running 64 bit, copy/merge  the entire contents of program files/cakewalk/Vstplugins/Cakewalk Sound Center to same under program files (x86).   Apparently Sound Center is a 32 bit application and no when bundled with newer versions of Sonar, it seems to put it under the 64 bit path.    I tried this and all my new sounds (hammond and steinway) all work now