I did, but as I have mentioned in a couple of other threads, it was kind of bumpy.
At first I was using my phone because my laptop site didn't show presale available, even though it was 10am.
I went over to my phone & searched, but was told no GA's were available. After trying 3 times, I went back to my laptop and somehow made it into the presale, where I entered my code, asked to search for GA Floor seats, and was presented with 2 for purchase.
I am not sure why people had problems, not only w/ the DC show--but I'd encourage trying again unless you've used your access code.