I have been actually doing that today, and in fact it does work. Did you go into config and make sure that Beatmaker is shown in the "non-wifi and Virtual connections"? Make sure 'Out' is highlighted by tapping it. Also, tap on the 'destinations' tab and see that beatmaker is checked. That should do it. (and as usual make sure BM2 has it's midi in turned on and that you arent in 'OMNI' mode.)
-Mark