Dawnie, the only way I can post pictures from my computer is to put them in photobucket first. I can't copy and paste from my computer. For whatever reason it doesn't work for me and you're probably having the same problem
I would go to
WWW.photobucket.com and set myself up. Then I would create my own album. From there I would upload my picture that I want off of my computer. Then when it is on photobucket, you can now copy and paste your picture here on Buddyslim. But you still have to press the A/A button.