Add not showing

Hello

My second add is in jpeg and doesn't show on my website. The first one is a gif and it's showing ok. The preview works in adplugg, I tried to upload a larger image but it still doesn't show... I have like an error (a blank and mini pic) instead of my add, and the link is working, but the display of the image is not.

Do you have any idea why? 

Thank you!