I have assumed that the reference to '133' indicates the scenery file #133. So I have deleted KMSY Photo_Real V3.0 scenery and restarted FSX. But now the same error messages are produced, presumably referring to the now 133 which is KATL_ETI. This may indicate that 133 is not the scenery number being loaded?
They are entirely unrelated to the scenery.cfg so, please, don't do anything to your scenery library, that number is the simconnect request id, which doesn't have any relationship to the scenery library.
you can activate the Simconnect diagnostic mode to see what's wrong with your install:
Open notepad, and copy the following text:
[SimConnect]
level=errors
console=1
RedirectStdOutToConsole=1
OutputDebugString=1
; file=c:\simconnect%03u.log
; file_next_index=0
; file_max_index=9
Save the file as SIMCONNECT.INI in this folder:
Documents And Settings\YOUR LOGIN NAME\Documents\Microsoft Flight Simulator X Files
At the next FSX launch, you should see a text window with diagnostic message, that should tell what's going wrong. Let me know what you are getting, so we can have an idea what's happening. You will probably see some Simconnect exceptions errors.