GTX 670 5760 x 1080 on Mass Effect 3

[Dillett7799]

Long time users, first time poster here. Ill keep it short and sweet.
Mass effect 3 wont increase res. up to my 3 monitor display, and I am unable to fix it.
I have installed and updated Flawless Widescreen, and have it running when I launch mass effect.
I have tried adjusting the Res-in game, and it wont increase past 1980x1080 (or 1920? whatever it is ^.^)
I fee like I am just missing a simple fix somewhere, or a text edit. Maybe a launch option?
Please advise, thank you.