We have 4 zrp6 controling local systems , Each local system has to control tivo's in a central rack. Each system works fine if its in its own file and doesn't have to talk to central rack. Once we combined the files only the first zrp6 in file works. The rest of the system does nothing not even its local controls. We talked to rti and got info on how setup zm24 and what order to plug them in but it still doesn't work. Has anybody out there had more than one zrp6 in a file and it worked corectly,