Hi,
Now we're making progress :-)
Please also check as I asked above what is being returned when you resolve 127.0.0.1
The second entry from your dev_rd (my host addresses are) is showing 127.0.0.1 with the fully qualified name of MRTSRVDEV. I would have expected it to show loopback or localhost for 127.0.0.1.
You have the luxury of being able to check against a system where it works.
so check what is being reported in the dev_rd of a system where it works.
Now you don't need to restart your entire instance if you just want to restart the gateway. Just search for "restart gwrd windows" in your favourite search engine. See sapntkill command.
KR,
A.