Trouble with GD in PHP

[gonzalezmfrank]

I have a problem with PHP and the GD libraries, my installation is Knoppix 3.8

When i tryed to use a PHP code that uses a GD like <? $im = imagecreatetruecolor(10,10); ?>

the result is " Call to undefined function: imagecreatetruecolor() "

my php details is

http://200.82.232.64:80/pruebas/info.php

Someone know how can i resolve this ?

Thanks a lot

Frank