update to 5 ?
i guess that's not an option
i would try to compare all ths hooks and eylets in both configs (4.75 and 5) to sort it
[ot slightly]
i have an 6i6 2.gen , but use only in 3+4 and out 3+4 , my headphone is plugged into headphone out 2 (aka 3+4)
in front of the 6i6 sits a mackie 12Vlz and the 6i6 is connected via the aux-bus and returns as lineins
roomspeakers are pluuged into mainouts of the mackie. the routingcapabilities in the mackie allows to
send the mix from the mackie as 2 track signal (i don't need more) to the fc and to the reaper and at
the same time to the roomspeaker. to isten via headphone i dial the headphone 2 pot at the 6i6 .
here is a site with closer description :
http://ethanwiner.com/mixer2daw.html
[/ot slightly]
i had some difficulites in the beginning to manage the focusrite control in the right way .. but once
understood it runs flawless.