you need to give us more info. Are these titles you've created in premiere? Do they look ok, when the video is paused? Have you tried exporting them and does the exported file look ok? Have you tried rendering them? Is your program monitor set to full resolution? Do you understand the difference between vector and bitmapped graphics? I'm assuming your graphics are vector based.
The same thing is happening to me. When paused they look fine, but when I get play they get all pixelated. These are titles that I have created in Premiere and it stays the same even after rendering. Any help/suggestions??