Orion SkyQuest XT6 Classic Dobsonian

Question

I just bought a Orion SkyQuest XT6 Classic Dobsonian and set it up, it came w/ the laser and I centered the mirror. However when I pointed it at mars it appeared to look the same as when I looked through the finder scope. Obviously I have missed something but I can't figure out what. By the way the is the first telescope I have ever owned and know nothing about them.