If you are seeing any HTML code in the forum instead of images or changes to the text then you need to change your prefrances. If you cant figure out if there is a problem or not , then if you see a picture in this post your fine , if you see some lines of coding and a link to an image , then you need to make the change.
Step 1 - Click on User C.P. at the top of the page
Step 2 - Click on the "Preferences" tab
Step 3 - Set "Always allow HTML?" or whatever it says , to YES
Step 4 - Click SAVE at the bottom
There , all done and you should now see the image in this post , along with all the other posts. ^_^