SEPM web access stuck at "Initializing, please wait..."\is not accessible.

Hello. Web access doesn't work in IE 10, 11, but work with IE8 (on old 2003 server machine) and with Chrome on win8 win7.

SEPM version is 12.1.5 (12.1 Ru5) build 5337.5000

Java client remote console works fine.

Have you any idea whats wrong with IE?