Notification to Administrator Email Blank as to Form Fields

Hello,
I have spent a few hours of looking and searching and have not found the answer to this question.
I am running version 1.3.11 on the latest version of WordPress. The form on our web site seems to be just fine, except that after the information is submitted the email that arrives is blank. When I go into Notifications to Administrator I can write information into the "Subject" and "Message" and it will appear in the emails after someone submits a form. However, none of the the form fields are working. Only words I write in. I insert form fields into the subject and message areas and the emails I receive after the form is submitted are blank.
Any help is appreciated.
Thank you!

I couldn't figure out how to upgrade it. The version is sooooo old it did not do an auto upgrade when I put the license key in and I was concerned about deleting it and reinstalling. However, I just found Carl Hancock's post on updating at http://www.gravityhelp.com/forums/topic/plugin-install-failed. He stated you do not lose the forms, so I just decided to update and now everything is working.

Upgrading resolved the whole issue. Thanks for your response. I was just apprehensive about creating even more trouble.