Pagenumbers gone in ps and pdf with Lyx 1.3.2

[Robert Neumann]

Hi,
I have a file with fancyhdr and the followings commands in the preamble.
It works fine with lyx 1.20
\usepackage {fancyhdr}
\fancyhead{}
\fancyhead[RO,LE]{\slshape Vorwort}
\fancyfoot[LE,RO]{\thepage}

Now I changed to lyx 1.3.2 and when I export to ps or pdf, the pagenumber in 
the footer is gone. 
It is still there when I use dvi or  dvipdf
Does anybody have an explanation?
Thanks Robert