Raven {{message}} not working within {{missing}} tag

Hi, I'm busy implementing raven, I've got the form all set up, but having problems with generating the {{ message}} tag within the {{missing}} tag. It works within the {{invalid}} on the same page. Here's the code I'm using...

                {{ if {raven:success} }}
                <div class="row success">
                    <h1>Thanks!</h1>
                    <p class="intro">{{ successmessage }}</p>
                </div>
                {{ else }} 
                {{ raven:errors }} 
                {{ if missing }}
                <div class="row error-block missing">
                    <h2 class="title">Oops, looks like you're missing:</h2>
                    <ul class="error-list">
                        {{ missing }}
                        <li><strong>{{ field }} </strong> {{ message }}
                        </li>
                        {{ /missing }}
                    </ul>
                </div>
                {{ endif }} {{ if invalid }}
                <div class="row error-block">
                    <h2 class="title">Looks like there are errors:</h2>
                    <ul class="error-list">
                        {{ invalid }}
                        <li><strong>{{ field }}</strong>: {{ message }}</li>
                        {{ /invalid }}
                    </ul>
                </div>
                {{ endif }} 
                {{ /raven:errors }} 
                {{ endif }}

Any ideas?