TeX/Latex - problema estilos pagina

hola, tengo el siguiente código

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
egin{document}
maketitle

include{agradecimientos}

hispagestyle{empty}

pagestyle{headings}

ableofcontents
ewpage hispagestyle{empty}

include{introduccion}

pagenumbering{arabic}
include{capitulo1}
include{capitulo2}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

mi problema es que en la cabecera de la pagina de la introduccion me aparece INDICE GENERAL en lugar de INTRODUCCIÓN. El codigo de introducion.tex empieza asi:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
chapter*{Introducción}
addcontentsline{toc}{chapter}{Introducción}

bla bla bla bla
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

alguien sabe porque no me aparece INTRODUCCION en la cabecera de la página???

gracias!!!!!!!!!!!!!!!!!!!!!!!!