Products in this category Fatal error

[Gabriel IT DATA]

Hi,

 

I have 1.4.0.4 version every thing is runing Good,

 

But i have problem on Catalog under products if i load a new product is going well but if i come back to see it or to edit it i can't see it anymore i'm getting this error message:

 

(Products in this category

Fatal error)

 

It does't want to show that product anymore but if i check it on client view i can see it and order it even but on back office is does't showing please can you help me to rung my shop ? here link where is been installed : www.zeonafrica.com/online/

 

thanks

 

Gabriel.