My UPS is Powerware 9130 1500 with a Network Management minislot 100036826 card, firmware upgraded to HF release. I'm trying to use the IPM 1.40 vApp on vmware 5.5, the IPM 1.42 windows version, the IPP 1.42 windows version, the IPP 1.10 windows version (on my CD). I have the same "communication lost" problem with my power source. After entering the pwd into Settings->Shutdown->Configuration section, the communication still working for about 1 minute. To get connected again I must remove the power source node and add it again....it works for about 1 min. again (in the 1.10 version, but in 1.40 and 1.42 it's not as simple to keep connected again.)
I don't think it's a network problem. I do not have any problem with the web interface. I also tested snmp v1 connection with Paessler SNMP tester and do not have problems to retrieve data...