Header doesn't show up on site
I have designed my website with css. It works great on my laptop - just exactly like it's supposed to. I uploaded to the web and my headers do not show up on pages other than the home page.
I use two "link rel style sheets" - one for the index and one for all other pages. When everything works on my laptop, I am at a loss to know where to look and what to change. It's exasperating. (Obviously, I'm a newby at this.)
Is there anything I have to do or list here to get help, or does someone have a suggestion as to where to look?
Thanks for any help,
The problem site:
The header is a picture of her head (on the right) with a forrest background. JPG format