Problem with file IO

I had a problem with file IO while save the data. This code is from internet. I can't get the test.txt file in my directory as the console there is already written file written. Can anyone tell me what the problem occur?

funtion writeFile()
{
%file = new FileObject();

if(%file.openForWrite("./game/data/test.txt"))
{
%file.writeLine("Hello World!");
echo("File Written");
}

else
{
error("File in not open for writing");
}

%file.close();
%file.delete();
}