alesis io|2

dear all,
i have an alesis oi|2 which does not seem to be working with max. an earlier post suggested adding a new devise in audio midi setup as well as chngeing the vector sizes in max itself. however this does not seem to be working. perhaps i am not doing it correctly, as i dont seem to be able to figure it out. please could someone help. i use osx.4.9

cheers paul