It seems like someone already fixed WFMT mp3 stream in the Reciva database, with one that works with my old faithful WFR-20 purchased December 2007, thanks.
I believe Dogmatix was correct about the inability of the old Reciva based WFR-20 to play some AAC+ streams, that is a fact, it doesn't play some of them. The reality is, that it at least still plays many AAC/AAC+ streams, contrary to my other FS based Sangeans, that play none. At the moment, it's still a great internet radio that plays most available streams, and with a much better web interface.