I have only P5 and Vue4.11 and have the same bogus "Invalid serial number" BS going on. Suspect it to be the overzealous copyright protection from CL,... have patched to the latest P5 SR, and tried again, but still got hosed by Vue on imported pz3s. Question: does the pz3 hold a copy of the serial number?? surely not,... that would go beyond paranoid to ludicrous.