Just added a 4511 to my setup. Camera works well generally but exhibits odd pixelation on the lower third of the frame. If I look at the camera directly through the acti web interface the video feed is fine. Looking at the camera in bcdvr i see the pixelation. The pixelation happens for a second or two and then the video straightens out. I couldn't find the 4511 in the settings section so I used the TCM-3501. Settings are attached in a JPG. I will email you a short clip of the video. Maybe just a settings problem with that camera?