hi, maybe because you are using the new bloggger template. it is very different from the old one.If you want help visit my blog. Theres a step by step tutorial on how your going to do it. It also have a graphic(clear and big) that shows exactly where you can find it. I hope it helps.
Here's the link:
http://axedbydax-webdesign.blogspot....s-to-your.html