I'm having a similar problem too
Running Windows 7 64-bit on laptop (and 32-bit on desktop - having exact same problem with both rigs).
Fruity Loops 9 Signature (XXL) not recognising MBox 2 Mini as an ASIO device. I have PT 8.0.4 installed. FL9 installed ASIO4ALL which doesn't recognise it either
It simply doesn't appear as an option in FL's Audio setup menu.