Hi,
If you haven't used LiveCycle Express before it takes about a day to activate that account. Can you send me your adobe ID (the one you use for Acrobat.com) and I'll see if I can accelerate it.
Also - if you have questions pertaining to LC ES2.5 prerelease questions, I encourage you to post them to the prerelease forums (after login to prerelease.adobe.com).
Take care,
Dan