Multithreaded VBA projects

Anyone have any experience in integrating VBA 6.0?
Need serious help here.

I am trying to develop a host application to create multithreaded VBA projects. But after a week of trying I keep running into the same error.

On the first several run the MT designer works okay, but after that it does not automatically loads up a VBA MT designer. Also, when I tried to add a VBA MT designer it gives me a vague system error message box.

And if I tried to load up a previously saved MT projects it gives me an out of memory error eventhough there's plenty left.

I am using VB 6.0 sp4 and using VBA SDK 6.1.

Any clues to my problem?