[Serusers] problem compiling CVS sources-pa module

[CURRO_DOMINGUEZ]

Hello

I have found a problem when compiling pa module and I can't get help 
from archives. 
I have downloaded all CVS sources to my directory. I have run 'make; 
make install' 

This is the error that SER shows:

pidf.c:32: libxml/parser.h: No such file or directory
pidf.c:33: libxml/xpath.h: No such file or directory
make[1]: *** [pidf.o] Error 1

I don't find these files in CVS.

Do you know where can I download these files?

Thank you very much.

Curro