Mysql not functioning after upgrade to 4.2.3

I just upgraded from 4.1.2 to 4.2.3 and now receive an "undefined function" error when running mysql_pconnect() or mysql_connect(). I used the same configure script as before and the Configure Command from phpinfo (below) includes Mysql. However, there's no longer a Configuration area showing for Mysql. Has anyone else run into this problem? Thanks, Jeff './configure' 'i386-redhat-linux' '--prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib' '--libexecdir=/usr/libexec' '--localstatedir=/var' '--sharedstatedir=/usr/com' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--prefix=/usr' '--with-config-file-path=/etc' '--enable-force-cgi-redirect' '--disable-debug' '--enable-pic' '--disable-rpath' '--enable-inline-optimization' '--with-bz2' '--with-db3' '--with-exec-dir=/usr/bin' '--with-gd' '--with-gdbm' '--with-gettext' '--with-gmp' '--with-iconv' '--with-jpeg-dir=/usr' '--with-mm' '--with-openssl' '--with-png' '--with-pspell' '--with-regex=system' '--with-xml' '--with-expat-dir=/usr' '--with-zlib' '--with-layout=GNU' '--enable-bcmath' '--enable-debugger' '--enable-ftp' '--enable-magic-quotes' '--enable-safe-mode' '--enable-sockets' '--enable-sysvsem' '--enable-sysvshm' '--enable-track-vars' '--enable-trans-sid' '--enable-yp' '--enable-wddx' '--without-oci8' '--with-imap=shared' '--with-kerberos=/usr/kerberos' '--with-ldap=shared,/usr' '--with-mysql=shared,/usr' '--with-curl=/usr/lib/' '--with-apxs=/usr/sbin/apxs' --------------------------------- Do you Yahoo!? Faith Hill - Exclusive Performances, Videos, & more faith.yahoo.com