Wow, Man, Roland needs to do something about their web site, I found it next to impossible to navigate with all the fly in animation and crap. This is new to me as I've been to their site lots in the past and it was normal to use. The search function is broken etc. what a mess. I'm glad Sonar is not part of that anymore..
 
I found more info on the Sweetwater page for it.  
I was trying to see if there was a software mixer etc.  and I don't think it has one.
 But I did see that the unit is Analog 2 in and 2 out with  3/4  being SPDIF. ( coaxial) 
So unless your monitors have SPDIF input there's only one way to hook it up. 
 
I would think by now after the Roland guy set the connection properly that it is working, yes? 
 

Hi guys giving an update .....guy from Roland seems to have sorted out most of my issues...it seems i have a couple of rogue tracks!!!!!!!!.....would like to thank all you guys for your help u prob think im a pain in the arse...bit new to all this so its sometimes hard to understand how it all works!!!!!!!!!!!!

Hi guys me again.....im getting crashes fault say Module C:\windows\system32\rdas1117.dii any ideas????

That's a driver error for the Roland.

cheers Bristol Jonesey.....just emailed roland....at this rate im gona have no hair left f.....ing thing is driving me crazy!!!!!!!!!!

If using Kontakt 5 w/ the Quad Capture see http://forum.cakewalk.com/FindPost/3166465

Is there any firmware update as well as a driver update?

iv got the latest update on both

Try this, make sure your outs/busses are set right first, then go into Sonar preferences, and unselect the ASIO or Driver you are using, hit apply, reselect the driver, hit apply...and see what happens....
 
Make sure in OS windows control, audio, that the Roland sound device is not being used as Windows audio default for audio playback...and the try above again...if that helps, if so doing?...helps me when that happens...I think it is a windows bug...as they are playing around with making audio a higher priority to get working better all around the table...win 10 release, so they test the other one first..R&D minions go mad...and money is made off the chaos...Seems so mindless of them to do...but that is progress I guess.....wink?
 
They may have made some bad choices, and released a bug ...and drivers are getting screwed up...with ins and outs or something like that....at least noticed here....but removing some of the bad updates, and resetting up again...has for now helped me solve for most of the losing audio, and or dropped device messages so far...When it does occur, that above sorts it out for me, at the moment....And less mead is needed to be consumed now....which could be a bad thing?...best wishes!

For audio drivers, full uninstall
Reboot.
Reinstall...
Often clears out some crap...
 
Yup and change windows default driver as Sir Les says... You could even disable it in Windows (Control Panel/Sounds).
 
Def a Roland problem regardless..
 
Cheers...