mr816csx quick connect issues os mavericks QUICK CONNECT

I recently bought a 2014 27 inch imac my mr was working great when i hooked it up to my mac, QUICK CONNECT function simply disappeared photobooth crashes when i want to record video using the interfaces mic input the HARDWARE SETUP window on cubase sometimes is there sometimes is not, my headphone signal deactivates by itself, long story short my mr816 is practically useless on my mac
i have all the most recent drivers, i concacted apple support and coulnt help, please if someboddy has the cure for this please share it!!!