MGE Network Shutdown Module

Just installed the MGE Network Shutdown Module and followed their guidelines described in the following PDF. But when I started the service their was no contact with the UPS:

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Network Shutdown Module
Communication with Network Management Card/Proxy has failed
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When we checked the UPS logs it complained about port 5000. After enabling port 5000 in and out the connection was restored:

[root@esx1 /tmp]# esxcfg-firewall -o 5000,tcp,in,MGE-IN
[root@esx1 /tmp]#  esxcfg-firewall -o 5000,tcp,out,MGE-OUT

[root@esx1 /tmp]# service mge-nsm restart

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Network Shutdown Module
Communication with Network Management Card/Proxy is restored
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