Higher resolution than 1080?

I can't get the resolution any higher than 1920x1080 - I have a setting for 2560x1440 in the graphic options but selecting it just resets to 1920 x 1080 everytime.

Wide Screen Gaming Group entry

www.wsgf.org/dr/independence-war-2-edge-chaos

I have that problem on windows 7. However, on the same computer, running OSX, and with I-War2 in a cider wrapper, I can go to 2560x1600 or any resolution lower than that.
I have had about 5 or 6 video card upgrades since the game first came out. For the most part, each, newer card showed increasing issues, artifacts, and especially, inability to go to high-res settings.

Yep the artefacts are a bind - flickering Z textures, the resolution cap is OK 1920x1080 is good enough at full sub sampling AA

Baseline (Widescreen) Solution & Issues
Solution 1
Although this game is in the MGL and listed as "Native", I thought I would add a little bit of info.
While the game does support WS resolutions natively, it crops off the vertical view (FOV-V)
I found that you can mess around with the FOV in every single camera view in the game.
edit the file "flux.ini"
search for "field_of_view"
you will find 9 instances of this for each of the different camera views in the game. They all are default around 1.1 to 1.2.
Change the value to a higher number to get a wider view.
I tried a value of "2.0" first... (refer additional screenshots)
Doh!
1.4 seems to be just about right. (refer additional screenshots)
I just thought I would add this info as it makes it more of a "true widescreen" experience.

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Solution 2
You can select your resolution ingame, but you must adjust the FOV manually for every camera mode. To do this, open the file "flux.ini."

In this file, you will find nine instances of the string "field_of_view," followed by a default value. Here is each instance, the default value, and recommended settings for 16:10 and 16:9 resolutions (rounded to the nearest percentage of a radian):

[icArcadeCamera]
Default = 1.2
16:10 = 1.37
16:9 = 1.48

[icChaseCamera]
Default = 1.2
16:10 = 1.37
16:9 = 1.48

[icConversationCamera]
Default = 1.1
16:10 = 1.27
16:9 = 1.37

[icDollyCamera]
Default = 1.2
16:10 = 1.37
16:9 = 1.48

[icDropCamera]
Default = 1.1
16:10 = 1.27
16:9 = 1.37

[icExternalCamera]
Default = 1.25
16:10 = 1.43
16:9 = 1.54

[icInternalCamera]
Default = 1.1
16:10 = 1.27
16:9 = 1.37

[icTacticalCamera]
Default = 1.2
16:10 = 1.37
16:9 = 1.48

[icTwoShotCamera]
Default = 1.1
16:10 = 1.27
16:9 = 1.37

Yeah, that's already in the technical FAQ