works but cannot change address

rowers/templates/instantplan.html

@@ -27,6 +27,11 @@
     <p>What the plan will achieve: {{ plan.target }}</p>
     {% endif %}
     <p>Weekly volume: {{ plan.hoursperweek }} hours per week over {{ plan.sessionsperweek }} sessions.</p>
+    {% if plan.price == 0 %}
+    <p>Price: Free</p>
+    {% else %}
+    <p>Price: {{ plan.price }}&euro;</p>
+    {% endif %}
   </li>
   <li class="grid_2">
     <p>
@@ -37,12 +42,20 @@
       You can select the end date manually or use the training target (if you have any), and the plan will start at
       the date it needs to complete in time.
     </p>
+    {% if plan.price == 0 %}
     <form enctype="multipart/form-data" action="" method="post">
+      {% else %}
+      <form enctype="multipart/form-data" action="/rowers/buyplan/{{ plan.id }}/" method="post">
+        {% endif %}
     <table>
       {{ form.as_table }}
     </table>
     {% csrf_token %}
+    {% if plan.price == 0 %}
     <p><input class="button" type="submit" value="Create Plan and Add Sessions"></p>
+    {% else %}
+    <p><input class="button" type="submit" action="/rowers/buyplan/{{ plan.id }}/" value="BUY NOW and Add Sessions"></p>
+    {% endif %}
     </form>
   </li>
   <li class="grid_4">