I have been having the same experience. Here is my code:
var myFiles = ["/Volumes/cg/Production/RND/ChrisPremiere/The_Story_of_the_Three_Little_Pigs-3-1.mov"];
// Import files and create a sequence
var pproj = app.project;
The code imports the files and creates a sequence, but the file is not imported into the sequence. How does one go about importing a Quicktime movie (or any media for that matter) into a sequence?