how do you add a banner to your profile?

Most of the responses are right and you just have to experiment with it on what browser works with you. For me, I used Firefox most of the time, I tried Chrome also and it never work out but when I switch to Internet Explorer, voila.. everything appears right there in front of me.

ok. i had the same problem, bu what the guys said helped me a lot. be careful, don't select to big banners. in my case i just can't post the big banners. simple doesn't workes. if it happends to you try again, ask for another HTML and post a smoller banner. sometimes it works this way. and something als: after yo hit enter you have to edit the banner otherwise won't appair.