Returning list of files in directory not working.

Gidday

I'm using the following code to try to put a listing of files in a dir into an array.

I created a dir call myDir in the same place as my .swf and .air, and placed a file in it.  But I get error messages telling me the File or directory does not exist.

Why would this be?

var dir:File = File.desktopDirectory.resolvePath("myDir");
var files:Array = dir.getDirectoryListing();

Thanks for taking a look.