help needed on imagettftext()

Hello, While working with some CAPTCHA stuff I get the following error: Fatal error: Call to undefined function imagettftext(). I have compiled with GD support and all the supporting libraries (Freetype, TTF, jpeg, X11R6 etc). What am I missing? Below is the configure command that I have used. './configure' '--with-gd' '--with-apxs2=/usr/local/apache2/bin/apxs' '--with-pgsql' '--with-jpeg-dir=/usr/local/jpeg-6b' '--with-zlib-dir=/usr/local/zlib-1.2.1' '--enable-gd-native-ttf' '--with-png' '--with-ttf' '--with-freetype-dir=/usr/local/freetype-2.1.9' '--with-xpm-dir=/usr/X11R6' Thanks & Regards, Harish Rao K, Nous Infosystems This e-mail transmission may contain confidential or legally privileged information that is intended only for the individual(s) or entity(ies) named in the e-mail address. If you are not the intended recipient, please reply to the postmaster@nous.soft.net, so that arrangements can be made for proper delivery, and then please delete all copies and attachments.Any disclosure, copying, distribution, or reliance upon the contents of this e-mail, by any other than the intended recipients, is strictly prohibited.