Hello David,
Thank you for contacting us.
Yes, SMMASF_2006_03_02.zip is quite old and was not updated for a long time, so it is likely it does not support IModuleConfig interface.
The recent version of the ASF Muxer is supplied with SolveigMM Video Splitter - http://www.solveigmm.com/?Products&id=VideoSplitter
So, don't hesitate to ask any question you have.