Well, you won't believe it, but my problem has just been solved...
Just for testing i uninstalled the Mixvibes v3 driver, deleted the folder "Mixvives" in which the driver was installed and then cleaned the registry with CCcleaner.
http://www.piriform.com/ccleanerAfter that i installed the ESI U46 driver,
http://driverscollection.com/?H=U46%20SE&By=ESI went to my DJ booth, and everything worked!
Don't ask me how or why, because in the past i couldn't get it working with this driver, but now it does.
Anyway, knowing it's working now i can go to rest. Testing the system will happen later this week to be sure everything is stable.
I lowered my latency to 192, which should be around 3 to 4 ms?
That wouldn't work in my former setup, so there is also improvement at first sight...
Hope you can do something with this info.
keep us informed!
Good luck and good night!