http headers

I'm running apache 2 with php4 on Windows XP.  Every file that is parsed
seems to display the HTTP headers.  For instance when I run the phpinfo()
test, I get the phpinfo screen ok, but at the top, all the header info is
printed out too.  When I look at the source, the header information appears
to be printing the document file first.



What am I doing wrong?



Thanks in advance,

Cindy