problem with helios dcs

[Roberto 83]

 

Hi everyone. I have 2 monitors, one 27 inch 1920x1080 resolution and one 7 inch 1280x720 resolution. in Helios I insert IFEI viewport in the 7 inch monitor as attached but as you can see from the other screenshot it is not displayed correctly. can anyone tell me how to fix it? 

thank you all for your support