[SWFKit]

There are two problems in your code.

First, in the as2 code, the parameters for the "addCallback" method are incorrect. Your code works in as3, but in as2 the method has three parameters. Therefore in as2 your code should be

function myFunc(x, y) {   return x + y; }
function myMethod(x, y) { return x + y + y; }

ExternalInterface.addCallback("myFunc", null, myFunc);
ExternalInterface.addCallback("myFunc2", null, myMethod);

Second, in the ffish script code, you cannot call the as functions in the "initialize" script, because at that time (when the "intialize" script is running) the main movie has not been loaded yet, and of course the as functions are undefined. Hence, you can only call them after the as functions have been defined. The following code works well

Application.registerASMethods("myFunc", "myFunc2");

function testResult() {
trace(myFunc("hello ", "world"));
trace(myFunc2("hello ", "world"));
}

Application.onMovieLoaded = function (movie) {
testResult();
}