Ok...so I use ASIO4all, with no issues...until tonight. I have a realtek audio card, which tend to suck. Anyhow, I have in my audio settings, that if i plug headphones into the front panel, it will bypass the speakers. I have the feeling that I have done this before...but its not working tonight. I am not getting any output. I plug my headphones in, and get audio through itunes...(to check for output) I open reaper, play...and nothing. It says the only output options are for HDMI channel 1 and 2. It is enabled as it should be...but no sound. Any suggestions?

Look in the ASIO4ALL control panel and make sure your headphone out is enabled, otherwise ASIO4ALL won't offer it to Reaper in the list of ins/outs.

yeah, everything seems to be enabled. I will try it again tonight and hope it was some sort of fluke...I am on vista 64, and was running other audio apps...