--with-mysql, yet mysql_errno() is "undefined"?

I use mysql_* functions all the time, PHP was definitely compiled --with-mysql, yet for some reason I'm getting "Fatal error: Call to undefined function: mysql_errorno()" for this one mysql function. Ex.: mysql_query($query,$connect); //echo of $query is successful at commandline, and $connect works for other queries on same page if(mysql_errorno($connect)==1062) //returns "fatal error" { $query_status="SKIPPED"; break; } Is this normal? Does PHP need to be compiled with some extra setting to support this function? The manual says this is supported in PHP3 & PHP 4 function, so I wasn't expecting to have a problem using it with PHP 4.0.3pl1. (MySQL is v.3.23.28-gamma; server is Apache 1.3.12) PHP configured with: './configure' '--with-gd' '--enable-track-vars' '--with-apxs=/usr/sbin/apxs' '--enable-sysvsem' '--enable-sysvshm' '--with-zlib' '--prefix=/usr' '--with-config-file-path=/etc/httpd/conf' '--enable-memory-limit' '--with-pgsql=/usr' '--with-db2=/usr' '--with-gdbm=/usr' '--with-ndbm=/usr' '--with-dbase' '--enable-trans-sid' '--with-xml=/usr' '--enable-debugger' '--enable-ftp' '--with-ttf' '--with-jpeg-dir=/usr' '--enable-bcmath' '--enable-trans-sid' '--with-mysql=/usr' '--with-xpm-dir=/usr/X11R6' '--with-png-dir=/usr' '--with-imap' '--with-dom' '--with-imap-ssl' '--with-mhash=/usr' '--with-mcrypt=/usr' This one really has me stumped. -- CC