This is a PayPal Payments Pro error you are getting. It is letting you know that you need to agree to the new agreement in your business account. You will need to login to PayPal to make this update.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.