How do i upload image for my yahoo profile?

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So i made an account and i want to upload an image. So i go to "My Activity" and after to "Edit My Preferences" After I have done that i click on "Upload Photo". Once i click on that their is only the purple image i have now, and i see that their is a "Add Photo". So i click on that which takes me to the new layout of Yahoo Profile, and this is where i get lost. I click on the image again and all that pops up is a black box with an "X" and the Facebook logo. I don't want to link my Facebook because i want to use an image from my computer. So can anyone help me?