In Fluorine:

<classMappings>

 <classMapping>

  <type><![CDATA[System.Collections.Generic.List<T>]]></type>

  <customClass>Array</customClass>

 </classMapping>

</classMappings>

In FluorineFX:

In services-config.xml

<channels>

 <channel-definition id=“my-amf“ class=“mx.messaging.channels.AMFChannel“>

  <endpoint uri=“http://{server.name}:{server.port}/context.root}/Gateway.aspx”  class=“flex.messaging.endpoints.AMFEndpoint“/>

   <properties>

    <legacy-collection>true</legacy-collection>

   </properties>

  </channel-definition>

<!–

<channel-definition id=”my-rtmp” class=”mx.messaging.channels.RTMPChannel”>

<endpoint uri=”rtmp://{server.name}:2037″ class=”flex.messaging.endpoints.RTMPEndpoint”/>

<properties>

<idle-timeout-minutes>20</idle-timeout-minutes>

</properties>

</channel-definition>

–>

</channels>