Monitor can only access 75hz @ 1024x768

[Ninjaster]

This is my monitor http://www.amazon.com/Xerox-XG-91D-19IN-LCD-700/dp/B0002SA3DY..
However I can't get it to that resolution and at 75hz https://gyazo.com/fcaae05e5112f517d37ecfd1526271e3
Why is that?
https://gyazo.com/121ac8acc26a9c1f93bb4ebb6a0f94ec

 

[scout_03]

on the 1280x1024 did you change the refresh rate to 75 hz and apply it .

 

[Ninjaster]

on the 1280x1024 did you change the refresh rate to 75 hz and apply it .

The option wasn't there.

 

[scout_03]

it use generic driver and what you see if you press advance settings under it .