Sounds like you were using the "attachment" feature. That's limited due to storage limitations on the cheftalk server.ImageShack® - Image Hosting
Upload the photo to that site. (note: if your photo is very large, please either use the "resize" option for message boards or use one of the clickable thumbnail urls when you post.) Imageshack will then give you a bunch of different url's to use. The thumbnail url's can be copy/pasted as is, but to display the pic full-size, use the direct link with image tags around the url. You can either type the image tags in manually or use the "insert image" button on the editor.
Press "quote" to see the bb code for the picture below:
And really, don't harass the jellyfish. That ain't cool.