So I just bought the Samsung 46" Class 7100 Series 3D 1080p LED HDTV. The image quality is very good, but I connected my Directv receiver and I'm having some difficulties. For example, instead of clearly being able to see the eyes and the defined faces it seems kind of blurry. I noticed that the TV has an option under Menu>Picture. The problem is that under Picture there are three options which are not highlighted, and therefore I can't modify. The options are Auto Adjustment, Screen, and Advanced Options. I think these options might be able to solve the problem, but I can't modify them. The straight lines don't look straight, and the pictures don't look well defined. Please help me with this problem!

Thanks in advance!!!!