Now I REALLY feel stupid , but I'm tired, and frustrated - so someone please throw me a bone here ... I'm currently trying to set up my system after a long day at work, so: Am pairing the receiver w/ JBL NSP1 - and I can not get speaker terminal cap off the receiver. The 'instructions' say "unscrew the speaker terminal cap" then "insert the exposed wire end" then "screw down the speaker terminal cap." I can unscrew all these caps only so far out, but they won't come off! If you have this receiver, help a tired old guy out! Thanks!