Problems with Method Datafile.save

[tfacchini]

Hi I want save some informations in a .txt file, heres my code:

name = "test";
var df = getAppDir() + "\\usermak.txt";

if (Datafile.save(df, "name"))
{
Dialogs.msgBox("saved", "Alert", 16);
} else {
Dialogs.msgBox("not saved", "Alert", 16);
}

No error happens but no file is created

Please anyone help me...

[SWFKit]

Please try

var df = getAppDir() + "usermak.txt";
trace(df);