If you have a VBox positioner on the C-Band dish, it could be your problem. Most VBoxes are compatible with DiSEqC 1.0 commands for P1 ~ P4. This function is automatically enabled when you cut power(unplug) the VBox. Until the VBox receives a DiSEqC 1.2 command it responds to DiSEqC 1.0 for 1~4...