avatar and inserting images

I am having a hard time inserting an avatar for my posts---I have gone to my profile--browsed for the gif/jpeg etc and when I upload or "submit" nothing happens--how can I rememdy this?
Also--others are able to post pics --I cant seem to use "paste" like I would do normally.
Can anyone help?
Thanks
Also--others are able to post pics --I cant seem to use "paste" like I would do normally.
Can anyone help?
Thanks