Be sure to try the 32 bit version of FireFox ESR.   I am running a 64 bit OS, but installed the 32 bit version of FireFox ESR and Java because I wanted to maximise compatibility with Java in the interests of getting this solved. ... View more

Oh and be certain that you're running Firefox ESR if you have two versions installed on your computer. Just use the "about" after you open up Firefox to make sure it is running the ESR variant. ... View more

My only suggestion would be to uninstall both, reload and only reinstall this one...   Java(TM) Platform SE 7 U51   But other than that, it should work in theory. You're on the same settings/versions as me. ... View more

When you open up the new Firefox (Mozilla Firefox) and go about:plugins in the address bar, does it list a Java Plugin version and details in there? ... View more

Howdy,   Have figured out a solution to this problem (initMMApplet: InitMMAppletInstance Failed to get instance) that actually works and will display your applet correctly.   The key issue is that the problem lies with no just the Java version, it is also is to do with the browser version.   Step 1: Download and install Java 7 Update 51, 32 Bit. You’re looking for the heading “Java SE Runtime Environment 7u51” on this page http://www.oracle.com/technetwork/java/javase/downloads/java-archive-downloads-javase7-521261.html with the file name jre-7u51-windows-i586.exe (Windows x86 Offline). Install it.   Step 2: Download and install Firefox ESR. This is in addition to your current version of Firefox. Basically, you’re installing another Firefox instance just to use for Unity. Install into a different directory (ie. Program Files\OldFirefox). When you install it, go for a Start Menu shortcut only. Now you’ll have two shortcuts in your Start Menu. One will just say Firefox, which is your latest version. One will say Mozilla Firefox. That is this special ESR version. You want version 52.7.3 (32 bit). Get it from here https://www.mozilla.org/en-US/firefox/organizations/all/ (It is English UK, 32 Bit).   That’s it. Open up Mozilla Firefox (Not your latest version of Firefox, the old one you just installed), go to Unity, accept all security warnings etc, ensure you don’t update the Java version, and it will be working.   Most of the guides on the web for this error focus on Step 1, but they don’t talk about Step 2, which is what I was missing. ... View more

Hi Dominic, My apologies for taking so long to respond. Yes, we did find the solution to the problem. Hope this works for you also. On the WCS (Wireless Control System), go to... Configure Controllers 802.11a/n Parameters Within here, you should see "Noise/Interference/Rogue Monitoring Channels". It will probably be set to "All Channels". Change this to "Country Channels", update/save the change. Repeat this for all the controllers you have. This worked successfully for us, eliminating the "Service Area" issue completely on our 7925's. Good luck! David ... View more