Hi I'm Midori

[Jaser]

Thanks.But I can't upload it.What form is demanded? Or I need an agency..

From the Change Avatar page either click "Browse..." and select the file, OR you can upload your image to a different website (imgur.com for example) and put the new URL of the image itself where it says "Avatar URL" (but make sure it's the image itself and not the webpage the image is on, you can usually right click an image then click one of the menu options to view it directly).