Millisecond Forums

Hi,
I'm having an issue presenting an image in a survey across different screen sizes. On a couple of computers, the image presents perfectly (in the middle, under instructions and above radio button questions). But on other computer screens, the image overlaps with the text and/or questions. I thought using the canvasaspectratio would prevent these issues, but they persist. What am I doing wrong? I've pasted my defaults below. Here is the link to the survey: https://mili2nd.co/ohjb. Attached is the script that I'm having trouble with. 

Thanks!!!

<defaults>
/ fontstyle = ("Arial", 12pt, false, false, false, false, 5, 0)
/ screencolor = white
/ txbgcolor = white
/ txcolor = black
/ minimumversion = "4.0.0.0"
/canvasaspectratio = (4, 3)
</defaults>