How old is your dog?
I personally did not have luck teaching my older dog (2 at the time), to crate using Susan's method. It could definitely be that I messed up somewhere along the line, as I was just dipping my toes into the dog training waters at that point. However, I bought the DVD and followed the steps, and ended up with a dog who will happily go in a crate, and not whine or cry, for many hours. HOWEVER, he also does not relax. He will just stand or sit there until he gets tired and lays down. This sometimes takes and entire hour. He will literally just stand up in a crate, not moving, for an hour. I feel bad leaving him unattended because I have no idea how long he will stay like that. It's rather bizarre, but I haven't analyzed the issue too much because I rarely have a need to crate him, as he is trustworthy to leave free in the house and tethers very nicely in public. So, FWIW, Crate Games is not necessarily always the answer, especially for novice trainers.
With my last two puppies, I have crated at night from the beginning, and done a simple version of crate games for daytime crating. I just tossed food in the crate to encourage them in, then continued rewarding for staying in voluntarily. I didn't do a systematic increase of time, though. Once the dog happily went in on its own, I would simply leave them a food dispensing toy, yummy bone, or stuffed Kong, and left them in there for however long I needed. Worked like a charm.