Hi Angelgreat
Go to your profile (your name right at the top of the page, when you are logged in)
Select "Forum Profile Information" in the left side menu
Select "I will upload my own picture"
You should be able to select an image from your hard drive or storage (I have a distant memory from when I did it that there may be a size limitation). It should appear above the Browse button.
When you believe that you have done that successfully, do one more thing:
Select "Look and Layout Preferences" and make sure that "Don't show users' avatars" is unchecked.
Good luck.
If it still doesn't work please send me a PM, telling me how far you were able to get, and then what happened, so that I can take it up with IT.
DAvid