I Have the same problem. I've tried clearing the system cache and re-installing both the title update and the compatibility pack but with no luck. It tells me to read the terms of use but there's no way as it's a huge page, I scrolled down to the bottom but that still didn't let me. Xbox 360 and I'm in the UK if that's relevant.
EDIT: I've just figured reading the terms of use is just optional, should let me download with no problem but as the OP said, there is a "no" symbol.