step by step... (assuming active keyclone and nothing running)

run wow 1. log in. video settings/windowed mode. 800x600 (just for testing). exit game (will guarentee settings saved)

restart wow 1. log in.

start wow 2. log in.

start keyclone.
setup.
do-not-pass ... clear list
general ... check to see if auto-add is enabled (i personally don't enable)
hit ok

if auto-add is not enabled, then click 'add' and then click the center of wow 1
repeat for wow2

note that override should not be pressed in

hit space bar. both characters should jump.
keyclone is now working.

let me know if that works

good luck