Problem with unused parameter

[devilj]

I have a function:

QCheckBox *Window::createCheckBox(const QString &text, const QString &key)
 
{
 
 QCheckBox *checkBox = new QCheckBox(text);
 
 	connect(checkBox, SIGNAL(stateChanged(2)), this, SLOT(addKeyword(key)));
 
 	connect(checkBox, SIGNAL(stateChanged(0)), this, SLOT(killKeyword(key)));
 
}

QCheckBox *Window::createCheckBox(const QString &text, const QString &key)

{

 QCheckBox *checkBox = new QCheckBox(text);

 	connect(checkBox, SIGNAL(stateChanged(2)), this, SLOT(addKeyword(key)));

 	connect(checkBox, SIGNAL(stateChanged(0)), this, SLOT(killKeyword(key)));

}

To copy to clipboard, switch view to plain text mode 

When I compile I receive:

warning: unused parameter ‘key’

Any thoughts?
Thanks