You can't upload your pictures directly to the site. You need to upload the photo somewhere, like FaceBook, PhotoBucket, TinyPic, etc. Then copy the URL to the picture.
In the post, click on the Img button at the top of the text input screen. Paste the URL between the Img tags, like this
Code: Select all
[img]http://www. Your image url . jpg[/img]
I hope that helps.