Me playing WoW on 50 inch

• Plasma HDTV features NetCast Entertainment Access to stream movies, TV shows and video, news, stock and weather updates to your TV directly
• THX Display Certification delivers exceptional video images and true sounds
• 600Hz sub-field driving refresh rate technology for realistic movement in sports and movie actions
• 1080p Full HD resolution 1920 x 1080p with 3x HDMI v 1.3 digital inputs with swivel stand
• Mega contrast ratio of 2 million to 1 provides sharper image quality

Product Description
Tap into internet content easily and seamlessly with this stylish, Full HD model. 50″ PDP 1080P Broadband HDTV, 1920 x 1080 Resolution, THX Display Certified, 600Hz Sub Field Driving, 2,000,000:1 Dynamic Contrast Ratio, 1,500 cd/m2 Brightness, ATSC/NTSC/Clear QAM – 1 Tuner, Dual XD Engine, SRS TruSurround XT, 4 HDMI input… More >>

LG 50PS80 50-Inch 1080p Plasma Broadband HDTV

I just bought component cables and hooked thwem up from dvd player to my Vizio, when I turn both on the Vizio only says 480i (SD). How do I change it to whatever the resolution of the dvd is? Thank You so much