Pop up loose focus in IE 11 on window server 2012 R2 but its working in IE 11 on Windows 7

Hi All,

I am working on some application where I have to open pop up on the click of some button. when I click on the button Pop up appears. but it loose focus in IE 11 on windows server 2012 R2. but the same application is working fine in chrome on same server and also in IE 11 on windows 7. 

Please guide me but would I do to handle this particular type of issue.