I just got a yamaha 5280 reciever and I am trying to hook up my speakers to it. Now I have the speaker wire going into the speaker, but when I try to put it in the reciever it does not stay in there. Like I untighten one of the knobs, but then when I tighten it up w/the speaker wier in it, the speaker wire can pull right out. Can someone please help me out and tell me what I am doing wrong? Thanks. -Drew P.S. Yes, the wire is stripped at the top. PLZ HELP!