Users are not able to edit the web page on web server while traffic passes through the Load Balancer

I have got the problem now. Please see the below codes:

Source Code from non working setup: req.open("POST", "http://testthatwasentme.co.uk:80/irj/servlet/prt/portal/prtroot/com.btexx.pct.easyWCM.EditModeRegistrationComponent", true);

Source Code from Working Setup:

("POST", "https://thatwasentme.co.uk/irj/servlet/prt/portal/prtroot/com.btexx.pct.easyWCM.EditModeRegistrationComponent", true);

I believe that the iRule to redirect these url from http to https is not working for POST quarries.