I'm not very familiar with this stuff so please excuse my ignorance. I hooked up an RCA RDT316Wi Home Theater System. Sound comes through the speakers when I have the tuner or the DVD selected. However when the TV is on I can't get the sound to come out of the new speakers, it will only come through the speakers on the TV itself. I have tried turning the tv speakers off but that didn't help. Not sure if I've hooked something up wrong or if I need to switch some settings on one or the other. Any ideas would be helpful. Thanks