Connection refused Error for benchmarking

Hi,
I have tried connecting four of my local systems for bigchaindb. when i am using benchmarking tool for load test. it throws me an error as shown below.
I have used a command to run is:
bigchaindb-benchmark
--csv results/master-32proc-1000000sync.csv
--processes=32
--peer http://10.40.20.150:9984\
--peer http://10.40.20.33:9984\
--peer http://10.40.20.44:9984\
--peer http://10.40.20.57:9984\
send -r1000000 --mode=sync

I have followed the steps mentioned clearly from https://github.com/bigchaindb/BEPs/tree/master/23

please help to resolve this issue.
Thanks in Advance
Regards,
Sai Kumar N

Start by reproducing the documented bigchaindb-benchmark command from BEP 23 and capture the full connection-refused error rather than relying on the image. Check how the benchmark connects to the four --peer endpoints; done means the requested sync load test reaches the configured peers without connection-refused failures.

Written by the indexing model from the issue text.