Help with MR816csx effects..

So I been trying to figure out how to use my MR816csx effects… Do I have to choose… “Legacy Fire-wire Driver”? In order to use the effects on audio/vst tracks?.. I’m having trouble because when I go to add the MR816csx re-verb, or eq, it says it is not available… Any help would be appreciated…

Make sure that you’ve set MR816 to “External FX” from its control panel.

Much appriciated… will report back if I run into any issues… Many thanks…