Just testing, will then post.

I posted one pic and then can't seem to post others, getting the "security token" message. Any ideas? I have contacted the administrators.

Sometimes it's the size of the picture. I get the security token when my pics are too big. If you resize it, it should work. When you attach file, it will tell you the max size it can be (ex: jpeg is 97.7 KB).
Hope that helps.

Also, make sure your pictures are in .jpg format - they are smaller than the bitmap ones, and will load more easily.