[CentOS] Install error - disc 2

I am doing a fresh install of 6.3 from DVDs that I created on a Windows laptop. I used ImgBurn to create them. When I started the install I selected "test" and both discs passed. The install requested disc 2 and after putting it in I get the message "That's not the correct CentOS disc". I tried creating another disc but still get the same message. The installation status bar shows that 1554 of 1555 packages have completed and that the omping package is installing. Curiously, when I look at disc 2 I don't see that package. Does anyone have any ideas about what might be going on here?

Thanks,

Burt