[Serusers] pa module make errors

Hello: I'm trying to build the pa module on Redhat ES4 with SER 0.9.4-rc1. I keep encountering the following errors. These seem to be due to incomplete variable definitions in the pa module makefile. Before I begin making changes has anyone else experienced these errors? If so and you corrected them can you explain how? Thanks. make[1]: Entering directory `/usr/sip_router/modules/pa' ../../Makefile.rules:80: pidf.d: No such file or directory ../../Makefile.rules:80: publish.d: No such file or directory publish.c:57:27: libxml/parser.h: No such file or directory publish.c:58:26: libxml/xpath.h: No such file or directory pidf.c:32:27: libxml/parser.h: No such file or directory pidf.c:33:26: libxml/xpath.h: No such file or directory -- ISC Network Engineering The University of Pennsylvania 3401 Walnut Street, Suite 221A Philadelphia, PA 19104 voice: 215-573-8396 215-746-8001 fax: 215-898-9348 sip:blairs@upenn.edu