RS232 control of a Samsung ME55A

I am trying to setup RS232 control over a new ME55A Samsung display.  I have tried every combination of cabling and codes I can come up with but the display does not respond.  The unique thing about this setup is the display uses a mini 3.5 jack to DB9 for it's RS232C connection.  Also the TV documentation keeps mentioning it's MDC program for remote controlling it when referencing RS232.  Is this TV not capable of basic RS232 control?  Am I missing something else?
Here is the example of how to com e up with the code (example is actually the code I need/use too):
https://supportforums.cisco.com/docs/DOC-14104
Here you can access the user manual for it:
http://www.samsung.com/us/business/support/downloads/led/LH55MEPLGA/ZA
I've been able to do this on a wide varietly of panasonics and LG's, so this is driving me nuts!
Thanks
-Gordy

Oct 2, 2012 5:57 AM                             (in response to bdavenpo)
RS232 Pinout for DMP4400G
I have  been using the 9pin to mini 3.5mm that is included with the DMP4310 on  the DMP4400 to conect to the ME46 & ME55 Samsung. The pin out is in  the Cisco Stadium Vision PDF on page 100.
http://www.cisco.com/en/US/docs/Sports_Entertainment/StadiumVision/Director/design/guides/3_0/SV_Video_Endpoint_DIG_3.0.pdf
I have found several of the adapters included with the Samsung monitors don't work.

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