Product Images problem

[simpso]

HI Everyone

 

Ive just started setting up a store using Prestashop.

 

Eveyrthing has been going fine until today when i tried adding a second image to a product.

 

Instead of getting the small thumb in the back office i just saw a number, which increments every time i try to upload a new product image.

 

On the front end the image is just blank as if it wasnt there.

 

Does anyone have any ideas on whats happened or how i can fix this?

 

Thanks in advance