Blank video for livestreaming

Hello,

I have inherited a server that is running Adobe Flash Server on linux and have a client that wants to live stream a broadcast next week.  When we check our rtmp code, we get "Movie not loaded" in Firefox, Chrome, and Internet Explorer.  The Flash server is not throwing any errors server-side, and the code we're using is as follows:

<!-- start code -->

<div style="width: 484px; padding: 10px; text-align:center; margin:0px auto; background-color: #FFF;">

<!-- basic player -->

<object width=424 height=240>

<param name="movie" value="http://fpdownload.adobe.com/strobe/FlashMediaPlayback.swf"></param>

<param name="flashvars" value="src=rtmp://fms-portal.isvm.ats.redacted.edu/live/&poster=http://intra.site.org/images/library/flashposters/flashposter-169-sml.jpg&scaleMode=zoom"></param>

<param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param>

<embed src="http://fpdownload.adobe.com/strobe/FlashMediaPlayback.swf" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width=424 height=240 flashvars="src=rtmp://fms-portal.isvm.ats.redacted.edu/live/&poster=http://intra.site.org/images/library/flashposters/flashposter-169-sml.jpg&scaleMode=zoom"></embed>

</object>

<!-- end basic player -->

<!-- required branding - link -->

<div style="font-size: x-small; color:#18453B; font-family:sans-serif; padding-top: 6px;">video served by<br />

<a href="http://site.org/video-services-hire" style="font-size: x-small; font-weight:bold; color:#18453B; font-family:sans-serif;" ></a>

</div>

<!-- end required branding - link -->

</div>

<!-- end code -->

Nothing has changed on the FMS machine, and the code is no longer working.  Does anyone have any functional code or reasons for this failure?