There was a sky mini dish at the front of a property we moved into 3years ago. I can't tell how long its been there for. I have only just hooked it up to a TM5500CIP to get all the FTAs on Astra 2 for the mother-in-law. All I am getting on the signal strength is 25% max. with no quality. Wondering why. Could any expert brains here please tell me what I might be doing wrong?