What is different in my case is that I am installing a GEOVISION brand Fish Eye camera GV-FE110 (I am NOT using any other 3rd party cameras) so I assume they should work without purchasing a USB KEY since they are your same brand.
Please see screen attached with the arrow and you can see I am installing a GEOVISION GV-FE110 Fish Eye camera but when I try to assing a display position on the Multicam, it shows error message :
The error message translated from Spanish is: "Failed Connection. Restricted by USB Key. The number is 0."
Why ?