You likely hooked the POWER ANTENNA lead to turn on the remote amp lead for the infinity amp ....
When you are on radio all works fine,The power antenna lead tirns off on CD's to retract the antenna ...
You need to connect the remote turn on lead (normally blue or blue white) to the white wire with black/or silver dots dependant on year

Guess you really don't READ my post ...So HERE we go again ....
The Power antenna line is meant for the motorized antenna's (that go up and down) when the radio is on it has 12 volts ,when you switch to cd the line goes to 0 volts (causing the antenna to retract) Since it's connected to the infinity amp it causes NO SOUND on CD ....
You need to connect the head units remote turn on line (normally blue or blue with white stripe)
To the factory harness white wire with black or silver dots ....