ESXi 5.1 and APC network shutdown

Hi,

I have an ESXi 5.1 vSphere Server and a APC Smart UPS 1500 with an Network Card 9630.

I installed the VMa and APC Network shutdown module 3.0.1? on it. I configured the connection between NSM and vSphere without problems.

But when I disconnect the Powersupply to USV the vSphere Server is not shut down.

In log-files of NSM I can see, that the USV has registered the loss of Power, and the Server shall be shut down.

But the only thing is shut down is the Web-page of NSM. The VMa and vSphere Server run and run and run... until the Battery is empty...

Where can i see wether the NSM / VMa can communicate with vSpere?

Is it a Problem of vSpere / VMa or APC NSM?

Greetings from Bochum, Germany