adding music to mi artist radio station

i'd like to add music to the radio station
of the artist i currently manage
but i can't figure out how
i now have a radio stn under mi user name
and that works awesome but i'd like to add music
to mi current artists radio station
if possible i'd actually like mi station to be under mi artists name

when i go to her last.fm set up its perfect& the music manager works fine
but when i click on play "this artists radio station"
it shows no content....

how do i add music to mi artist radio station...

mucho gracias

L*