rmx wont be detected on mbp

i bought a second hand hercules rmx for a gig i got to do with virtual dj.
the unit was working perfect at the sellers house. allthough it was on pc at the testing time.

i have:
macbook pro early 2015 running sierra 10.12
hercules rmx installed with the hdjcseries mac® [djseriesinstall 5.92s]
installed virtual dj infinity 8 (latest version)

the rmx keeps on flashing (all lights) and virtual dj does not detect it...

i got a very important show friday night and need to mix videoclips!!

help! 🙁