Error connecting cube over TCP to mission planner

I am trying to connect cube over TCP to mission planner for swarming quads. But I get an error message telling connection failed.
I have downloaded and installed MAVlink Proxy, Cygwin etc as mentioned in Wiki. But still not able to establish connection with SITL.
The SITL folder in the C: drive does not have the file swarm.bat. I am new to this and unable to find a solution. Please help.
Attaching the link to the screenshot of the error message.