SCCM 2012 Out Of Band

Good morning, 

I have a test environment where i am trying to configure SCCM 2012 and OOB. 

I have configured the OOB service and logged into the IME and configured it with the correct HASHS and enabled the network.

When trying to provision the AMT sccm logs: DoConnectToAMTDevice: Failed to establish tcp session to 192.168.0.13:16993

I can connect via the web browser on 16992 but not 16993 - I have attached my amtopmgr.log file, as you can see at the top it connects once and detects the AMT but it then reverts back to undiscovered. 

Any help would be appreciated. 

Thanks, Lee