Syntax of keyword definition

[harry meyers]

Hi,

I am using the latex package play to typeset dramatic texts. To
highlight a name of my figure I added the following line to my ~/.emacs

(font-lock-add-keywords 'latex-mode '(("\\<\\(Harry\\)" 1
font-lock-warning-face t)))

Now, when I start latex-mode in the *scratch* buffer and type Harry it
is highlighted. But if I open a .tex file with Harry in it, it is not.
The same happens when I save the *scratch* buffer to example.tex - the
highlighting disappears instantly.
I presume something must be wrong with syntax.

harry