GD (Image generator) {?!}

Hi guys, Got a little prob that's got me stumped. This simple image generator script: http://scripts.operationenigma.net/image_generator.php Source: http://scripts.operationenigma.net/image_generator.phps works, I know because it was working on my system before I recompiled PHP. Feel free to have a play, but just clicking submit as-is should generate a black box with the text in it. Now, however, it doesn't work... Here's my phpinfo(): http://scripts.operationenigma.net/phpinfo.php It says GD's compiled in there, but it doesn't work! Surely there's a logical explanation for this... Any help is appreciated :-) Cheers, Liam