The Technet plus part of the Action pck subscription isn’t quite authorized yet as far as I can tell.
Here’s the instructions but folks are still having issues accessing the site.
You may activate your TechNet for Action Pack subscription by completing the following steps:
1. Visit the TechNet site.
2. Sign in as a first time user with your Windows Live ID associated with your Microsoft Action Pack Solution Provider subscription.
3. Enter your contact information and Benefit Access Number (Technical Contact ID**)
4. Accept the agreement to complete registration.
**To find your Technical Contact ID, sign into the Partner Membership Center: https://partners.microsoft.com/PartnerProgram/PartnerMembershipCenter.aspx
Click on the Requirements and Assets tab and select Assign Contact Roles (your Technical Contact ID will be listed next to your name). At this page you can also add and change technical contacts within your organization.