Installing Verisign PFPro Support

Hello! I'm trying to configure PHP with Verisign PayFlow PRO support on my server. I'm running FreeBSD 4, Apache 1.3.12, mod_ssl, openSSL, and mySQL 3.23.32. I downloaded the newest release of PHP (4.0.4pl2) and tried compiling it, using the ./configure --with-pfpro=[dir] thing and I get the following error: /usr/home/arcwebn/signio/freebsd3/lib/libpfpro.so: undefined reference to `pthread_mutex_unlock' /usr/home/arcwebn/signio/freebsd3/lib/libpfpro.so: undefined reference to `pthread_self' /usr/home/arcwebn/signio/freebsd3/lib/libpfpro.so: undefined reference to `pthread_mutex_destroy' /usr/home/arcwebn/signio/freebsd3/lib/libpfpro.so: undefined reference to `pthread_mutex_lock' /usr/home/arcwebn/signio/freebsd3/lib/libpfpro.so: undefined reference to `pthread_mutex_init' I've never done anything like this before, so I'm not really sure what's goin' on. Any insight into the problem would be greatly appreciated! Thanks! -brady -- Brady J. Horenstein brady@imagetrends.com