DV dub to Beta SP flickers

I could use some advice from you guys. I need to transfer a program on DV tape to Beta SP. I hooked my DV deck directly to a Sony UVW 1800 and dubbed it over. The problem is that the Beta copy has a bad flicker in the video that is not in the original DV version. Its most noticable in the lighter colors. Can anyone tell me why the dubbed copy is flickering? How do I fix it? This was supposed to go out yesterday so any help would be greatly appreciated.