[PD] [ pix_mix ] & [ pix_chroma_key ] don't work for win 7 ?

[Фывапр Олджэвич]

Hi list !

Strangely, [ pix_mix ] and [ pix_chroma_key ]  seems not working at my Windows 7  in pd-extended 42.5 .

So when I load two different images in the help file - the objects show only one of them, but nothing mixes, when i tweak the slider.

Aren't the objects for Win , or I do smthn wrong ?  

But some other pix-objects i tried - they do work. 

Thanks!

спасибо !