Plugin Help

[Mac]

Hi,
I'm new to this forum but have been using AM for quite some time now. I have built a cessna 210 cockpit and have been using AM after discovering it on the net some time ago as it is the best software I have come across so far!
I'm not sure when my problem surfaced as I had 2 problems arise at the same time. Firstly I upgraded to ver 2.1.1 and my co-pilot monitor which was an old 19" square dinosaur died. I have upgraded to 2 LED 16:9 monitors for the panel
and was in the process of re-positioning all my gauges to suit the monitors and realised the FSX no longer connected to AM. I was sure the plugin was installed correctly however I have had no luck getting the gauges to work. I performed a fresh install of AM, again ver 2.1.1 and all went well however now when I try to install the FSX plugin I receive an error...

Problem signature:
Problem Event Name: CLR20r3
Problem Signature 01: fsxplugininstaller.exe
Problem Signature 02: 2.1.1.14
Problem Signature 03: 56adcdf8
Problem Signature 04: System.Xml
Problem Signature 05: 4.0.30319.17929
Problem Signature 06: 4ffa5c6f
Problem Signature 07: 96e
Problem Signature 08: 27
Problem Signature 09: System.Xml.XmlException
OS Version: 6.1.7600.2.0.0.256.48
Locale ID: 3081
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

I have now spent 2 full days and nights trying to sort my FSX to AM connection problem out and now this, so any help would be greatly appreciated.

Thanks Brian from Oz

Just to clarify, I am running FSX and AM on the same PC with 3 monitors..