Queued topic problems generally boil down to either permissions or MSDTC configuration. For permissions Neuron requires that Anonymous Login have full control over the topic queue.
MSDTC must be configured correctly.
Remote Receive MSDTC troubleshooting and general queue trouble shooting can be found here:
General MSDTC troubleshooting can be found here
Finally, make sure to double check firewall rules ports must allow inbound and outbaound traffic on the required ports.