[amsat-bb] FT-736R won't send CW

I posted this to the 736R forum but have not received any good answers. I know I must be missing something obvious but I can't get my FT-736R to work in CW mode. I plug in the same key I use with my FT-767GX, press the CW button, turn on the VOX, press down the key and nothing happens. Rig works fine on SSB and FM. Before I open up the case and dig in, what am I missing??

Thanks!

Al W8KHP