Okay Suga, I understand what your saying now.
Your forum avatar is actually tied in with the avatars on the website including the profiles avatar. I don’t know if you noticed, but everyone that has a profile avatar is the same image as used on the forum. I hope that makes sense hehe.
Anyway, just click on "my hamster central" then click "change my account settings" and then scroll down the page to the area for uploading avatars and upload your image of choice.
The avatar image can be no larger then 80x80 pixels large. If you don’t understand what that means then I can resize and upload your avatar for you if you can provide me the image you want to use.
After you upload you should see that your profile avatar has changed from the green question mark to your new image!
Please let me know if you encounter any more problems.