Solved! Go to Solution.
Flex modules are not supported in Flex Mobile. This article ports the viewer to the desktop; the section which states:
"The next step is to add all the modules to the project. Go to Project - Properties and then in the ArcGISFlexDesktop Properties dialog select Flex Modules and add the following mandatory widgets .... "
is where you will fail when you try to set this up for use on iOS/Android in a Flex Mobile Project.