Hi, I am having trouble installing freeswitch-1.2.5.3 on CentOS 5.5 from freeswitch-1.2.5.3.tar.bz2. The following error shows up during make. I installed autoconf26x-2.63-4.ius.el5. How can I tell make to use autoconf26x instead of autoconf? Thanks. make[3]: Leaving directory `/var/install/freeswitch-1.2.5.3/libs/curl/lib' make[2]: Leaving directory `/var/install/freeswitch-1.2.5.3/libs/curl/lib' Making all in src make[2]: Entering directory `/var/install/freeswitch-1.2.5.3/libs/curl/src' (CDPATH="${ZSH_VERSION+.}:" && cd .. && autoheader) aclocal.m4:20: warning: this file was generated for autoconf 2.67. You have another version of autoconf. It may work, but is not guaranteed to. If you have problems, you may need to regenerate the build system entirely. To do so, use the procedure documented by the package, typically `autoreconf'. configure.ac:65: error: Autoconf version 2.62 or higher is required aclocal.m4:8484: AM_INIT_AUTOMAKE is expanded from... configure.ac:65: the top level autom4te: /usr/bin/m4 failed with exit status: 63 autoheader: /usr/bin/autom4te failed with exit status: 63 make[2]: *** [config.h.in] Error 63 make[2]: Leaving directory `/var/install/freeswitch-1.2.5.3/libs/curl/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/var/install/freeswitch-1.2.5.3/libs/curl' make: *** [libs/curl/lib/libcurl.la] Error 2