If you are trying to post pics, then click in the field you write your post in.. then click the icon above this text field that looks like a tree. When the box pops up, click the icon to the right of the IMG URL field. Then click 'choose file' in the upload field. This will open a browser window that shows your computer file structure. Navigate to the photo you want to upload. Remember that this site supports jpg, gif, or png. Click upload, then insert on the original page. You should have a picture now.
You can also post pics from sites like photobucket by pasting the DIRECT LINK image code into the IMG URL field that pops up when you click the tree icon.
Have fun!!!