Hello,
To fix the issue try downloading and installing the latest cart version from the downloads page:
Full Cart Downloads:
http://www.smith-consulting.com/Suppo...
Trial Downloads:
http://www.smith-consulting.com/Forum...
Important: Please make sure you install and test on a NEW dnn sandbox account before installing to your live site. Additionally, before you install to your live portal please make sure you have a full backup in case you need to rollback.
Thanks