I'm sorry, but I cannot replicate the problem in any way. The meaning of the error message is the SimConnect_text() procedure couldn't be found in the Simconnnect.dll library.
Since the SimConnect_text() is not available in the original Simconnect that came with FSX RTM ( before service packs ), the only possible explanation is that, because ANOTHER 3rd party module has requested THAT version to FSX, bglmanx.dll cannot get the one IT needs, which is the latest one, the one installed with SP2/Acceleration pack, because something in the Windows Side-by-side loading system, which is supposed to allow two versions of the same .DLL to be loaded in the same process at the same time, is not working.
Since this issue cannot be replicated in any way, I ask if someone with this error to PM me, to arrange a Teamviewer session, because I need to do some tests.