thanks for your response in cmd 100 reg 8 i have programed as follows 080133031 .this hotel uses night mode 24/7 .i have tried 081133031 also 081132031 jusy does not make sense. could it be the software ,or control card? they did have problems with slots 1 and 2 the ons was making crackling type noise in those slots ,i moved them to slots 3 and 4 the noise went away . everything else works.please any input would help .