Creating Model Text

I'm trying to create ModelText in a Revit model via the APIs but I'm not sure how to accomplish this.  Here's what I have so far but it crashes with a Protected Memory Error:

            string templateFileName = uiapp.Application.FamilyTemplatePath + "\\Generic Model face based.rft";  //"\\Annotations\\Generic Annotation.rft"; //"\\Generic Model.rft";

            Document fdoc = app.NewFamilyDocument(templateFileName);

            using (Transaction tx = new Transaction(fdoc))
            {
                tx.Start("Create Model Text");
                ModelTextType pMT = new FilteredElementCollector(doc).OfClass(typeof(ModelTextType)).First() as ModelTextType;
                MyCreation.FamilyItemFactory pFIF = fdoc.FamilyCreate;
                try
                {
                    pFIF.NewModelText("Joe", pMT, uidoc.ActiveView.SketchPlane, new XYZ(0.0, 0.0, 0.0), HorizontalAlign.Left, 5.0);
                }
                catch (Exception ex ) {

                }
                tx.Commit();
            }

If I use the "\\Annotations\\Generic Annotation.rft" Family Template it will throw an exception stating there was an error creating Model Text.

Any guidance would be appreciated.

Thanks,

Joe