Cannot create file

[sharpsword]

Hello,
I'm trying to output some text into a new file but the file.open call always returns false.

QFile file("test.txt");
if(file.open(QIODevice::ReadOnly | QIODevice::Text)){
	file.write(ui.label->toPlainText().toUtf8());
	file.close();
}

QFile file("test.txt");
if(file.open(QIODevice::ReadOnly | QIODevice::Text)){
	file.write(ui.label->toPlainText().toUtf8());
	file.close();
}

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I found the following in the documentation of QFile's open function:

Note: In WriteOnly or ReadWrite mode, if the relevant file does not already exist, this function will try to create a new file before opening it.

So I thought it may have something to do with the permissions, and I tried :

file.setPermissions(QFile::WriteOwner);

file.setPermissions(QFile::WriteOwner);

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But it returns false as well.

Any idea about how I can create the file ?

My environment :
Qt 4.6.2
Carbide.c++ 2.3.0
S60 5th Edition SDK v1.0
winscw emulator