Xonu_Directdebit

1. Open app/code/community/Xonu/Directdebit/etc/config.xml and find following lines:

   <controller_action_predispatch_checkout>
       <observers>
           <xonu_directdebit_observer>
               <class>xonu_directdebit/agreements</class>
               <method>controllerActionPredispatchCheckout</method>
           </xonu_directdebit_observer>
       </observers>
   </controller_action_predispatch_checkout>
   

   Replace them with:

   <controller_action_predispatch_checkout>
       <observers>
           <xonu_directdebit_observer>
               <class>xonu_directdebit/agreements</class>
               <method>controllerActionPredispatchCheckout</method>
           </xonu_directdebit_observer>
       </observers>
   </controller_action_predispatch_checkout>
   
   <controller_action_predispatch_firecheckout>
       <observers>
           <xonu_directdebit_observer>
               <class>xonu_directdebit/agreements</class>
               <method>controllerActionPredispatchCheckout</method>
           </xonu_directdebit_observer>
       </observers>
   </controller_action_predispatch_firecheckout>
   

2. Navigate to System > Configuration > TM Checkout > Firecheckout > Ajax Save and reload rules and add Payment Methods value to Agreements depends on option: