Hi Usha,
You are apparently using a wrong IP. The issue is that 127.0.0.1 is a so-called loopback address - it's always the address of the local system you are currently on. This is not an external IP. Please ask your IT guys to help you figure out the IP address of your Collab server, and then use the IP they give you. This may be an internal IP address that you can access only inside your LAN, or an external IP address that you can access over the Internet - this depends on your network setup, and our IT guys will help you figure this out.
I hope this helps!
