I have a problem posting pics too.
Here is what you do:
find the url of thge picture you want to post. This means that your own pics have to be converted onto a url by using flicker, fotki, tinypic, or whatever.
Then, encase in in brackets like this:
< img src =(put your url here without the parenthesis) >< /img src >
You have to remove the spaces before and after the < > to make it work.
Freepmail me if I can be of further help.