The photo upload buttons for all ads (except text-only ads) are located on the far right side of the ad form, either when placing a new ad or when editing your ad from your Ad Management area. You may have missed it if your monitor is small, you just need to scroll to the right to see it. After selecting the photo(s) from your computer when the dialog box pops up, the photo will show up in the window above the browse button. After you've selected all the photos, Preview and Save the ad. It's not necessary to upload photos when placing the ad. If you are having difficulty, try creating an ad without photos, then "Edit" the ad and upload them at that time.