Aspect ratio

yo!
Since im used to play 4:3 stretched in almost every fps game, i would like to setup it on aapg aswell.
Already added 1440x1080 via cru.
It works in Windows and in every game, but not in army.
Tried to change it in Systemsettings.ini
also used setres 1440x1080f (even w und wf dont work)
Monitor(Eizo FG2421) is saying "signal error" whenever i open the game.
Any help?
Since im used to play 4:3 stretched in almost every fps game, i would like to setup it on aapg aswell.
Already added 1440x1080 via cru.
It works in Windows and in every game, but not in army.
Tried to change it in Systemsettings.ini
also used setres 1440x1080f (even w und wf dont work)
Monitor(Eizo FG2421) is saying "signal error" whenever i open the game.

Any help?
Comments
Ultra wide wasn't a thing back when the game was made
I can select 1440x1080 (4:3) in windows. But i got the error when selecting it in army.