unable to test MPEG-4 files using fmscheck.exe

I am trying to run fmscheck.exe to test server status

i am using bat file with code:

set /A counter = 0

:start

start /B fmscheck.exe --host localhost --app vod --play sample 0 all --timeout 360 --logfile output_log.txt

set /A counter = %counter% + 1

IF %counter% LEQ 9 goto :start

I have sample.flv and sample1_1500kbps.mpeg-4 file in my application\vod\media folder.

When i run sample file using code given above it runs successfully

But when i input

start /B fmscheck.exe --host localhost --app vod --play sample1_1500kbps 0 all --timeout 360 --logfile output_log.txt

it gives error: File NOT found

I tried this command:

start /B fmscheck.exe --host localhost --app vod --play mp4:sample1_1500kbps 0 all --timeout 360 --logfile output_log.txt

it gives error: File NOT found

What is the problem here?