What is wrong with this server!

Alright guys i have a Flash Gallery thats using XML I have it posted on two different servers:

This is my server and it works perfectly on it.

This is the clients server and for the life of me it wont work im running PHP on it but what else could make this happen. As you can see it wont load the images no matter what.

Any light anyone can shed on this gloomy gloomy day would be so appreciated.