you do not need compatibility mode, you just need to set the resolution exactly in maximizer setup

1. click setup on keyclone
2. click maximizer,
3. switch to display 2
make sure u can see both, if not resize them.

or u can use one of the predefined ie 1x4 and only use 2 of the others, and make sure in the command editor, you specify the correct region for each wow.

*as others have stated, make sure kc runs as admin