I think many of the other Arena members use Photobucket as well to insert pics! So you create an account, upload your pictures to photobucket, and when posting, you will have a small window at the bottom of the post where you can log in to photobucket. You can scroll down, select the intended image, and copy the URL code specific to that picture (scroll down and the code will be in a box next to the words 'IMG:' and the code will start with [IMG]) and paste it onto your post, so your image will show up!
Hope this helps!