a) This is not dll specific. It applies only to the .exe. Did you name it the same as your .exe with .config appended to the name? You might try copying the seqedit.exe.config from your seqedit.exe directory to make sure you get the contents correct.
b) Have you tried setting a breakpoint, stepping through the code and debugging it to see why it's crashing? I suspect some of the pointers you are getting back are NULL. You might want to check the documentation for CDotNetGetExceptionInfo to see if that is possible. Or just debug the code to see why it's not working.
-Doug
