A couple of bugs/issues with FlashVars and Command line options.

The Command line property under Run Options of the Application properties is disabled when you choose the Build type of SWF File. Yet you need to complete these to be able to pass FlashVars parameters during testing within MMF (ie: before you build a SWF file).

The workaround is to set your Build Type to "Stand alone application" which makes this the Command line parameter active, then set your parameters, eg: /param1MyValue /param2Value2 (note no space after param1, param2 etc) and then put the build type back to SWF File.

Also the help file refers to GetCommandItem$ when it is infact CommandItem$. Under the special considerations for SWF Files it would be worth mentioning using the Command Line application property (and how to construct it) while testing within MMF.