Can't access inputTitle from "submit" action

admin-modal

<div class="modal-dialog">
    <div class="modal-content">
        <div class="modal-header">
            <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
            <h4 class="modal-title" id="myModalLabel">{{title}}</h4>
        </div>
        <div class="modal-body">
          {{yield}}
        </div>
        <div class="modal-footer">
          <button type="button" class="btn btn-default" data-dismiss="modal">{{btnCancel}}</button>
          <button {{action "submit" inputTitle}} type="button" class="btn btn-primary">{{btnSave}}</button>
        </div>
    </div>
</div>

index.hbs

{{#admin-modal id="modNewCat" title="Kategorie hinzufügen" submit="newCat"}}
  <form>
    <div class="form-group">
      {{input type="text" class="form-control" id="form.inputTitle" value=inputTitle placeholder="Kategorie Name"}}
    </div>
    <div class="form-group">
      <textarea type="text" class="form-control" id="inputDesc" name="inputDesc" placeholder="Kategorie Beschreibung"></textarea>
    </div>
    <div class="form-group">
      <div class="input-group cp">
          {{input type="text" value="" class="form-control" id="inputColor" value="form.inputColor" placeholder="Kategorie Farbe" }}
          <span class="input-group-addon"><i></i></span>
      </div>
    </div>
  </form>
{{/admin-modal}}