Hi. I'm using the trial version of EF and I'm having a problem with DL info.

I'm searching for award availability ATL-BOS during the months of December and January. On the DL site award calendar, almost the both months are entirely green with low award of 25K points seats. When I use sample dates of 12/17 with return 1/15, I have a wide choice of flights options.

However when I input this information to EF, and in the Fare Class "N", and hit Search, EF comes back telling me there is no availability. But there is, and plenty of it--I see it staring back at me from the DL site.

Am I doing something wrong? Is DL opaque with info? Or are there limitations with EF and/or DL?