Dynamic Streaming Error: Playback Failed, Failed to Play (stream id: 1)

I'm testing out using the current release of the SMP code on my localhost and when using this F4M manifest I can play into the video about 8 seconds before this error message appears. Any ideas what I'm doing wrong?
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns="http://ns.adobe.com/f4m/1.0">
    <id>birds</id>
    <baseURL>rtmp://flv.stream.aol.com/flash</baseURL>
    <media url="mp4:aol/us/aoltruestories/2010/CinelanNew/cinelan-064-Wild-Wings_Ben-Gonyo_4000_16x9 _500" bitrate="500"/>
    <media url="mp4:aol/us/aoltruestories/2010/CinelanNew/cinelan-064-Wild-Wings_Ben-Gonyo_4000_16x9 _1000" bitrate="1000"/>
</manifest>
I'm passing the "src" parameter on the embed code with this F4M.
I've been able to play this F4M successfully:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns="http://ns.adobe.com/f4m/1.0">
    <id>Dynamic Streaming</id>
    <duration>253</duration>
    <mimeType>video/mp4</mimeType>
    <baseURL>rtmp://cp67126.edgefcs.net/ondemand</baseURL>
    <media url="mp4:mediapm/ovp/content/demo/video/elephants_dream/elephants_dream_768x428_24.0fps_4 08kbps"  bitrate="408" width="768" height="428" />
    <media url="mp4:mediapm/ovp/content/demo/video/elephants_dream/elephants_dream_768x428_24.0fps_6 08kbps"  bitrate="608" width="768" height="428" />
    <media url="mp4:mediapm/ovp/content/demo/video/elephants_dream/elephants_dream_1024x522_24.0fps_ 908kbps"  bitrate="908" width="1024" height="522" />
    <media url="mp4:mediapm/ovp/content/demo/video/elephants_dream/elephants_dream_1024x522_24.0fps_ 1308kbps"  bitrate="1308" width="1024" height="522"/>
    <media url="mp4:mediapm/ovp/content/demo/video/elephants_dream/elephants_dream_1280x720_24.0fps_ 1708kbps" bitrate="1708" width="1280" height="720" />
</manifest>
Thanks!

Hi John,
Form the description of your issue (and from a short investigation) I can deduce that your assets do not have synchronized keyframes. Please try to re-encode them and force a fixed keyframe interval.
Since the switch can be done on keyframe only, and if you do not have a keyframe in the second stream at that position, the playback will stop with an error.
S.

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