file resize problem

[eluser]dimis[/eluser]
I put

Code:

photocopy($this->config->item('pr').$this->data['product'][0]['color_photo'],
61,128,$this->config->item('prview').$list['code_photo']);

but there is no change.
At debugging all seem ok.
The function is called 3 times at my example with the write arguments
(/path/example1.jpg next /path/example2.jpg for example) but only one from the 3 are created.