video not found - path problem?

We have some HTML pages that embed a swf file to stream flv videos. The video doesn't play and I firstly thought it was the video player's version problem. But it seems more to be related to the path now.

The video is located at /opt/adobe/fms/applications/sites/media/nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video/a5.hi8.flv.

Case 1:

<embed src='swfs/StrobeMediaPlayback.swf' ...  flashva
rs='&src=rtmp://130.14.16.21/sites/nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video/a5.hi8&autoHideControlBar=false&strea
mType=recorded&autoPlay=true' type='application/x-shockwave-flash'>

can successfully play the video; and I saw an entry in the access log like this:

play    stream  2011-01-27      13:21:44        EST     nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video/a5.hi8     10.1.100.53     23327   0       2       _defaultRoot_   _defaultVHost_  sites   _definst_       0       200     130.14.160.29   rtmp    -       rtmp://130.14.16.21:1935/sites  rtmp://130.14.16.21:1935/sites  -       http://medulla.nlm.nih.gov/video/swfs/StrobeMediaPlayback.swf   WIN 10,1,102,64 4702111234693087599     3205    3450    normal  nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video/a5.hi8     -       -       rtmp://130.14.16.21:1935/sites/nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video/a5.hi8.flv  rtmp://130.14.16.21:1935/sites/nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video/a5.hi8.flv  /opt/adobe/fms/applications/sites/media/nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video/a5.hi8.flv flv     11319545        279.265991      0       -       0       0       -       -       -       -       1       -       -       -       -       -       -       -       -       http://medulla.nlm.nih.gov/video/testFMS.html   -1      -1.000000       -

Case 2:

<embed  id="video" name="video" src="/video/nlmVideoPlayer.swf" .... flashva
rs="playerLogo=/video/SeniorHealthLogo.swf&colorTheme=0x513484&flvPath=rtmp://130.14.16.21/sites/nihseniorhealth/alzheimersdi
sease/symptomsanddiagnosis/video/&hi8=a5.hi8&lo8=a5.lo8&hi7=a5.hi7&lo7=a5.lo7&captionUrl=a5.xml">

fails to load the video, and I got an entry in the access log with a 404 error as follows:

play    stream  2011-01-27      13:22:05        EST     a5.hi8  10.1.100.53     23327   0       2       _defaultRoot_   _defaultVHost_  sites   nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video    0       404     130.14.160.29   rtmp    -       rtmp://130.14.16.21/sites/nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video  rtmp://130.14.16.21/sites/nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video  -       http://medulla.nlm.nih.gov/video/nlmVideoPlayer.swf     WIN 10,1,102,64 4702111234726642031     3256    52698   normal  a5.hi8  -       -       rtmp://130.14.16.21/sites/nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video/a5.hi8.flv       rtmp://130.14.16.21/sites/nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video/a5.hi8.flv       -       flv     0       0.000000        0       -       0       0       -       -       -       -       1       -       -       -       -       -       -       -       -       http://medulla.nlm.nih.gov/video/nihsh_ip.html  -1      -1.000000

So it looks like the server cannot find the video in case 2. The log indicates that, the first case loads the default instance of application "sites" and navigates to path nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video; and the second case looks for the instance nihseniorhealth/alzheimersdisease/symptomsanddiagnosis/video of application "sites". For both cases, the rtmp://.... path seem to be exactly the same. Why is the second case not working?

If I copy the video to /opt/adobe/fms/applications/sites/media, the second case can successfully play the video (without captioning). So I am wondering what shall I do to make the second case work without copying the video to /opt/adobe/fms/applications/sites/media? like changing the configuration file or something?

Any suggestion would be greatly appreciated!