Find.region is not working in different browser

hello support team,

i'm using test complete11.31. i created some region checkpoint On Chrome. and playback of image click operation in Chrome then click operation works but if i use different browser like IE then click operation not happened and vice-versa.

var page = Sys.Browser("*").page("*");
var pagePicture = page.PagePicture();
var rect = Regions.FindRegion("Image1",pagePicture)
if (rect != null)
{
var x = page.ScreenLeft + rect.Left + rect.Width/2;
var y = page.ScreenTop + rect.Top + rect.Height/2;
var img = Sys.Desktop.ObjectFromPoint(x, y);
img.Click();
}

Window version - window7(64bit);

IE version - IE11.31

Chrome Version - Chrome49

so please help to overcome this problem.