So, assuming you are trying to use a basic receiver and not a Genie or an H-25 (neither is compatible) then you will need to go into the receiver settings, Repeat Satellite Setup, and ensure the antenna type is set to 18" round and the switch type is set to Multiswitch (SWM is also not compatible).
You did not answer if the antenna has ever worked for you.
What I post is my 2 cents and nothing more. Please don't read anything into my post that's not there. If you disagree, that's OK.
Can't we all just get along?