[Serusers] Presence Module with Ser

Hello, I received the following errors when attempting to compile the source related to ser-0.10.99-dev30-tm-timers-pa-3. Any ideas on what is causing the problem? I was able to successfully compile and run ser-0.9.6 and want to add the presence patch. In file included from route_struct.h:44, from route_struct.c:41: /usr/include/regex.h:362: parse error before "size_t" /usr/include/regex.h:369: parse error before ':' token /usr/include/regex.h:378: parse error before ':' token /usr/include/regex.h:382: parse error before ':' token /usr/include/regex.h:386: parse error before ':' token /usr/include/regex.h:390: parse error before ':' token /usr/include/regex.h:393: parse error before ':' token /usr/include/regex.h:396: parse error before ':' token /usr/include/regex.h:461: parse error before "size_t" /usr/include/regex.h:554: parse error before "size_t" /usr/include/regex.h:556: parse error before "regerror" /usr/include/regex.h:557: parse error before "size_t" make: *** [route_struct.o] Error 1 Thanks Warren