Trying to get my head around multi-bitrate streaming with FMS 4.5 and FMSE 3.2

Hi

Currently I am streaming single live streams at the moment using FMSE 3.2 and FMS 4.5

As we have sevral locations with different bandwidth limitations I started playing with the idea of multi-bitrate streaming as this would resolve alot of issues.

I have set up FMSE 3.2 to stream two streams as a test:  a 200kb and 500kb stream

The files streaming are VP6 FLV files

The Stream names are set to: livestream%i

The Streams run with no issues to FMS 4.5

I created a manifest file called rtmp-live.f4m with the following:

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns="http://ns.adobe.com/f4m/1.0">

<id>Dynamic Streaming</id>

<mimeType>video/x-flv</mimeType>

<streamType>live</streamType>

<media url="rtmp://server/live/livestreaml1" bitrate="200" />

<media url="rtmp://server/live/livestream2" bitrate="500" />

</manifest>

When I use the sample videoplayer webage and type the URL: of http://server/rtmp-live.f4m

I get the error message in the video window: "We are having problems with the playback. We apologise for the inconvenience" which provides no clue as to the issue.

However if I put the rtmp URL for the streams in then the streams work at their different bitrates as expected: rtmp://server/live/livestream1 or rtmp://server/live/livestream2

There is obviously some issue reading the manifest file ?

Any suggestions on what I am missing?