Why won't it let me place a classified ad on here?

Been trying to list a few things for sale on here and every time i hit submit it just takes me back to the first page for posting an ad and doesn't publish my listing? I'm using a mac and tried it with both Firefox and Safari...

Your photos are too large.

People for some reason don't think about the fact that their digital camera takes HUGE photos. Photos that would never fit on a page in their ad.

Edit your photos to less than 1000 px by 1000 px and less than 100,000 bytes each.