We have about 50 each of SA US2-40 and PCS WS1D and 10 each of PCS LM2 and FMD2 all spread about evenly over two phases, bridged by a PCS PRR2 repeater. The network has been operating successfully for about one year. There are about 100 links. We purchased HS2 and a new PCS USB PIM and downloaded the plugin for a 30 day trial. The status page operates the LM2s and FMD2s but not the US2-40s nor the WS1Ds. Where a link contains a command to an LM2 or FMD2, it also works, but not to the other two device types. We sent a HS support request but because the trial expired without a substantive reply we now can't independently troubleshoot. We suspect malformed or misaddressed packets. Has anyone encountered a similar problem and if so, how did you resolve it?