I have found that if you are trying to get a quote for multiple days using the code online it doesn't always work. Try it one night at a time and it should be just fine. If I was booking it, I would definitely call in-house reservations. I find it easier to just check the available dates through the link provided above though... JMO.
And just so everyone knows- make sure that you get IN-HOUSE reservations, and not the Hojo main reservations.... they don't know anything about the ET rate!
I have found that if you are trying to get a quote for multiple days using the code online it doesn't always work. Try it one night at a time and it should be just fine.