[App_rpt-users] DMK URI COS and Audio Question

I'm new to AllStar and I just got a URI from DMK. I hooked it up to my ICOM FR-4000 repeater. I can key up the repeater with "radio key" command. I used "rpt fun <mynode#> *81" it keys OK but no audio. Also, when I key up the repeater I never hear a CW ID so I'm not sure if the COS is working. My repeater manual says for COS: "Busy Out, Open collector=OFF, 0 V=ON". Any ideas? Tnx 73 Greg