Watermark with GD

I am trying to get the watermark to work, however I am having a problem in that the image is being called from a database (image sits in images file). The script in question is this $image = imagecreatefromjpeg($_GET['src']); However it produces an error message of Warning: imagecreatefromjpeg() [function.imagecreatefromjpeg]: Filename cannot be empty in /home/content/a/l/i/alinde52/html/imagesDetail.php on line 233 I have tried various methods, for example: ($_GET ['images/'] or ($_GET ['images/$row_WADAimages["image_id"]]. Can anyone shed some light on this for me. Thank you Gary __________ Information from ESET Smart Security, version of virus signature database 5575 (20101029) __________ The message was checked by ESET Smart Security. http://www.eset.com