Samsung T240HD audio and HDCP problems

Hey,

We've just finished building a media PC, Windows 7, and we are having two problems with the interaction between the PC and the Samsung T240HD monitor.

1) Problem 1: Initial connection was DVD-D for video and mini-jack for the audio and that worked fine. Switched to HDMI to HDMI and no audio with or without using the analog mini-jack connection. An HDMI running from the Blu-ray gives both video and audio--so it appears that the Samsung can both accept audio via the HDMI cable and doesn't deactivate the audio input stream when the HDMI is connected (that an the analog mini-jack input is labeled "DVD/HDMI audio." Could it be that the motherboard (ASUS P8P67) (no video card) stops sending audio over the analog audio jack when an HDMI cable is plugged in?

2) Problem 2: Monitor will not play the video stream of "copy protected" programs via the DVD-D cable. The motherboard, monitor, and Windows Media Center are all supposed to be HDCP compliant. Had used this monitor with another Windows 7, WMC, computer set up and had no problems displaying HDCP content. Somewhere in the process, the HDCP handshake chain is being broken--monitor, motherboard, software, driver, cables? How to narrow this down?