WM Chem eStandards Module and TN

We are trying to use the Chem e-Standards Module, especially the wMChemSample, for starters. However, in the process of using it with TN and Modeler, we are unable to trigger the process of the model, even if the XML doc is sent via the Trading Networks.
Any thoughts on what are the gotchas or checklist? we are using the webMethods 6.01 suite.