Slide show don´t show images i random mode

I set to show in random and leave the idproduct empty, but they don´t show the images in radom and automactly set the id product to 36.

Show the imagem and check the site www.editoraalecrim.com.br

Hi,
Can you tell us more detail? Or how can we see the problem when set it to ramdom. Currently we do not see any problem at front-end.

Thanks