the following error is produced when I try to upload a jpg image of about 23k for my profile. I tried several times over the last few days and also from home and work and get then same result. This is the same picture I have sucessfully uploaded to other projects.

Fatal error: Call to undefined function: imagecreatefromjpeg() in /websites/boinc/projects/cpdnboinc/html/inc/profile.inc on line 270