SMS Signature+ funktioniert nicht

You can add your favorite contacts in the app to quickly send messages too with your signature automatically appended.  Just select the one you want to use and whenever you send a text from our app, your signature will be appended at the end!  Have you ever wanted to set a signature while texting or iMessaging your iPhone, iPod or iPad?  You can now access and append your signature from the Messages app!  The original app that allows you to add a signature to your texts!  To get started just tap "Send Text" in the top right, enter the recipient and enter your message!  Well now you can with SMS Signature!  You can create as many signatures as needed.  The signature Is automatically added.