I'm sorry, but we don't have any explanation for that error. It happens to a couple of users (out of many thousands) and we still can't replicate it in any way. The more likely explanation, might be that your system is overloaded by too much stuff, but that's just a theory. It might be caused by a conflict of another add-on that we don't know about.
You might try disabling ALL non-FSDT modules in your %APPDATA%\DLL.XML and %APPDATA%\EXE.XML files. Edit the XML files with a text editor like Notepad, and change all the lines that reads:
<Disabled>False</Disabled>
Into this:
<Disabled>True</Disabled>
Do it for every addon, EXCEPT bglmanx.dll in the DLL.XML file, and Couatl.exe in the EXE.XML file.
Also, if you start FSX from another add-on, don't do it. Always start FSX from its own icon.
