Overloading of Qt::ToolTip::maybeTip doesn't work

Hi,

I am trying to implement a dynamic tooltip. The problem is that 
overloading Qt::ToolTip::maybeTip does not work for me. I already have 
reimplemented virtual functions in perl, but for some reason it does not 
work for maybeTip. QToolTip is not a subclass of QObject. Does that matter?

When I switch on debugging of virtual functions I get:

virtual 0x8772ea0->QToolTip::maybeTip() called
Cannot find object for virtual method

I am using
PerlQt 3.008
Qt 3.3.3
perl 5.8.2

Thanks in advance,

Ole.