imagettfbbox

am trying to build a water mark on the web, when i call the function imagettfbbox() I get the following *Fatal error*: Call to undefined function imagettfbbox() in */usr/local/apache/htdocs/captcha.php* on line *60* OS: RHEL4 Pack: Apache2, PHP5.2, GD Config: './configure' '--with-apxs2=/usr/local/apache/bin/apxs' '--enable-shared' '--with-mysql=/usr/local/mysql' '--with-zlib-dir=/usr/lib/' '--enable-versioning' '--enable-track-vars=yes' '--enable-url-includes--enable-sysvshm=yes' '--enable-sysvsem=yes' '--with-gettext' '--enable-mbstring' '--enable-ftp' '--enable-calendar' '--with-config-file-path=/etc' '--with-oci8=/u01/app/oracle/oracle/product/10.2.0/db_1' '--enable-soap' '--with-gd' '--enable-xml' '--with-xml' '--enable-sysvsem' '--enable-sysvshm' '--enable-sysvmsg' '--with-regex=system' '--with-png' '--with-ttf=/usr/lib' '--enable-sigchild' '--with-jpeg-dir=/usr/local/lib/jpeg-6b' '--with-freetype-dir=/usr/local/lib/freetype' '--with-png-dir=/usr/lib/' gd GD Support enabled GD Version bundled (2.0.28 compatible) GIF Read Support enabled GIF Create Support enabled PNG Support enabled WBMP Support enabled XBM Support enabled any help -- madunix