I just posted a reply to another thread about this same thing. ASIO2 and ASIO3 compliant host applications WILL share drivers with other apps. ASIO1 hosts will not. I am pretty certain that BB is not ASIO2 or 3 compliant.

ALSO, your soundcard drivers must ALSO be ASIO2 or 3 compliant in order for 2 hosts to be able to use ASIO at the same time.