is the network you are on connected to the destination server's network?
the destination server has a private network ip address (should not be accessible from the internet).
more about private networks here.
You tried to ping the server ? Did you verify the ssh service on your server ? Is the port 22 opened ? Is root allowed to ssh to the sever ?
Hope that helps!
Your computer and the remote computer are on different networks. IP addresses alone are not enough to simply get there. You need to set up a route to get to the remote computer.