If I load pictures to my products, all disappear after 4 loaded

[Freedomseeker]

Hi all,

 

I am loading 6 new products into a product category.

 

I loaded the products with info first and they all showed in the shop no problem (with x's instead of the picures).

 

I then added pictures to 4 of them, no problem. When I add the 5th picture, they all disappear from the shop, which still says

 

"Displaying 1 to 5 (of 5 products)", but nothing is showing.

 

There's a liar in my program!!! :o

 

Please help.