Detail image

Hello everyone!!

I need help I am doing a gallery every thing work fine except for one detail, I made a XML file every image display OK, then on a roll over state a caption appears that work fine too, when you click the photo to see it in detail every photo disappear except the one clicked and a larger photo holder appear into position and actually the square appears but not the image and i could not make it work or I am kind of blocked.

Thank you in advance for your help on this.