I am surprised to hear you suggest the use of a recent Java version. In my experience, the applets (iGrids, etc) generated by MII 12.2.4 are unsigned and therefore way too problematic to be used by more recent versions of Java with added security restrictions. That is why, when our consultants led the development of our MII application 2 years ago, they suggested the use of Java 6 Update 18 specifically for that reason.
If I am wrong about any of this, please let me know.
I'm not seeing your email address. If you want to email me, my address is X at thomsonreuters.com, where X = gregory.boettcher.