Trouble Connecting to FMS in the Amazon Cloud

Question

I get the following error message when I try to connect to and stream videos that I have uploaded to the Amazon Cloud (AWS Streaming Distribution) using the basic Strobe Media Playback:
Connection attempt rejected by FMS server
Connection failed.
However, the same connection string nets a successful connection and streaming using both Amazon's Streaming Diagnostic Client as well as test Flash apps that I have created.
Here is what I am using in my StrobeMediaPlayback.html file:
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=10,1,0,0"
width="550" height="400">
<param name="movie" value="StrobeMediaPlayback.swf"> </param>
<param name="flashvars"
  value="src=rtmp://xxxxxxxxxx.cloudfront.net/cfx/st/Captain_America_Trailer"
  &urlIncludesFMSApplicationInstance=false
  &streamType=recorded
  &loop=false
  &autoPlay=true
  &playButtonOverlay=false
  &controlBarAutoHide=false">
</param>
<param name="allowFullScreen" value="true"></param>
<param name="allowscriptaccess" value="always"></param>
<embed
  src="StrobeMediaPlayback.swf"
  type="application/x-shockwave-flash"
  allowscriptaccess="always" allowfullscreen="true" width="550" height="400"
  flashvars="src=rtmp://xxxxxxxxxx.cloudfront.net/cfx/st/Captain_America_Trailer"
  &urlIncludesFMSApplicationInstance=false
  &streamType=recorded
  &loop=false
  &autoPlay=true
  &playButtonOverlay=false
  &controlBarAutoHide=false">
</embed>
</object>
I get the same error message whether I try using a .flv file (with and without the file extension) or a .f4v file (using the mp4: prefix).
Thanks for your help.

Answer 1

Silviu, thanks for that.
Chris' post thread was very helpful.  It's getting closer, but still not there yet.
Following are some test links that might help to see what is happening.  In each example, you can view the page source in your browser to see how the player is setup and referencing the connection path and video file.
This first example shows the JW Player, which successfully streams a video from our Amazon RTMP Cloudfront.  Notice that the "_definst_" is not required in the connection path:
http://107.20.182.109/keithweb/JWPlayer/JWembed.html
This next example shows the Adobe Strobe Media Player setup using the JavaScript method.  Before, I was getting a failed connection message.  But now after reading Chris's post thread and adding the "_definst_" to the connection string, the connection is being made but the player still does not recognize the same video file that the JW Player can stream in the first example.  This example nets a "Stream Not Found" error:
http://107.20.182.109/keithweb/Adobe/StrobeMediaPlayback.html
Finally, this last example shows the Adobe Strobe Media Player setup with the embed method using the <object> tag.  Again, the same video file that was able to be streamed with the JW Player gets an error here.  However, it is not a "Stream Not Found" as in the previous example.  This time you need to click on the "play" button to see the following error:  "Playback failed.  Invalid tincan object name (stream ID: 1)."
http://107.20.182.109/keithweb/Adobe/StrobeMediaPlayback_II.html
Again, I truly appreciate your time and assistance with this.  Any further light that you can shed on the situation would be wonderful.  I will continue to look into it myself, as well, to try to see if I have made some silly mistake that is just not apparent at this time.
Thank you very much.