MySQL support compiled in, but functions not recognized

Hello Everyone- I recently installed PHP 4.0.3p|1 (the latest version) onto my Linux machine, running Apache. I compiled PHP with MySQL support (--with-mysql). However, when I try to use the mysql_connect() function, I get a "Fatal error" message saying that I am using an unrecognized or undefined function. The PHP compile process seemed to go fine- I have re-compiled it from scratch a few times now. Nothing seems to work. I tried re-compiling with the explicit path to MySQL- when I did that, the compile crashed about halfway through, saying it could not find the necessary MySQL header files. That makes me think I am doing something wrong. My MySQL daemon is running fine, however, as is Apache. Could I be forgetting a conf file modification or the like that would cause PHP to not recognize the MySQL functions? Note that this isn't a DB connection problem: PHP isn't recognizing the mysql_connect() function at all. Thanks in advance for any assistance. Please reply to dlobron@harcourt.com or dlobron@world.std.com. Sincerely, David Lobron