Have recently upgraded a customer's old MICS to BCM 450 Rel 6.0. Customer upgraded all sets from old M series to T series. The only set they kept was an older revision E Nortel Audio Conference Unit. The unit works as it should only it will not set relocate. It did it once correctly and now won't do it again. I've tried another unit and same thing. Has anyone got any idea's about what to do or even if the unit is compatible with this software.