A "multi-switch" is not a DiSEqC switch. They use 22khz tone for switching. The DP34 and DPP44 work with DiSEqC 1.0 and I have used both that way. If the OP does have a 4x4 multi-switch, then it can only receive two locations, not three. You need both H and V polarities output from two sats for the 4 inputs on the 4x4 multi-switch.