PVC Calculator Support

PVC Calculator can not add photos
offered through component and it is a direct link to the photo I have tried everything
as: images/win2.gif
web/images/win2.gif
domain.com/web/images/win2.gif

I have joomla 2.5.4
Well, certainly I do a mistake somewhere
I do not have anyone in your neighborhood who would be dedicated site Thanks a lot
Miso

please answer quickly