Can't play live H.264 stream back from end...

We're having a strange issue with FMS 4.5. We are streaming live H.264 encoded video to FMS and then playing it in a custom video player we've built.

When the h.264 stream has been playing for a while and we connect to the stream the stream always plays back from it's beginning on high speed. Sometimes we don't see the video... all we see is a black screen until the video catches up. I've tried setting the following properties on the client side...

And the following properties on the server side....

<StreamManager>

      <VirtualDirectory>

      <Live>

         <AccumulatedIFrames>

            <MaxTime>0</MaxTime>

            <MaxSize>0</MaxSize>

         </AccumulatedIFrames>

         <Queue enabled="false">

            <AggregateMessages enabled="false"></AggregateMessages>

         </Queue>

      </Live>

      </VirtualDirectory>

   </StreamManager>

But have had no luck. I'm stuck