djay pro 2 on a mac, crossfader fonction doesnt work on hercules dj control inpulse 300

hello,

i’m trying to use  a hercules djcontrol inpulse 300 with a djay pro 2 (for now i test the trial version, but i will buy the official, if it works) on a mac, with a spotify premium account.

i got problem with the crossfader function.

it’s doesn’t work on the hercules, the only deck working is the deck 1

is it a limitation of the trial version, or is it a midi problem configuration, or is a commercial restriction ?

thanks for your help and support

damien rais