PCNS doesn't work after upgrade VMA

Hello, I use PCNS 3.0.1 on Vsphere ESXi 5.0.1 and VMA to shutdown the VM's and the host in case of a power outage. Last week I upgraded VMA 5.0.0 to the latest version 5.0.0.1 (not really an upgrade, but a fresh install). Unfortunately the automatic shutdown doesn't work anymore. When I run the shutdown script, it seems the relevant ESXi host can't be find or it isn't being managed by the VMA. The