Can't add images to new products

[rstrange]

Hi

 

For some reason we seem to have lost the ability to add an image or thumb to a new product. When I try to I get the following error page message.

 

Fatal error: Call to undefined function: imagecreatefromjpeg() in /home/deleted for security/public_html/classes/gd.inc.php on line 47

 

Thanks in advance for any help or advice.

 

Regards

 

Richard