I cant post in the classifieds

Ive been trying to post one of my guitars in the classifieds section but cant seen to get it to work. I will fill everything out and when i go to post it, it just goes to a blank page. please help.

You are trying to upload huge photos and this is causing your ad to fail.

Photos must be smaller than 1000 px by 1000 px and you can't upload more than 300,000 bytes in one upload. So, if you're uploading 1 photos it must be under 300,000 bytes if you are uploading 4 photos the combined total must be less than 300,000 bytes.