Alan, From your statement "...with the option to select one of the memory banks..." I'm not quite clear about how you are trying to carry out the transfer. I am assuming that the Song Manager which was included with your PR804 is the same as that which came with the KN7000. (Version 1.00)
I think that it may be better if we try to solve this problem by email, rather than on this forum, since I would like to exchange screen shots with you and it's not really practical to do this on the forum.
If we manage to resolve the issue, then we can post the solution here...........
My email address is in my profile.