How do I create a project and add summary and sub-tasks

I'm trying to create a project that has about 63 tasks, but I'm getting a GeneralQueueCorrelationBlocked error when I attempt to publish it.

The basic steps that I am attempting:

1. Create the Project and call context.Projects.Update and then check it out
2. Create the Tasks, add them to the DraftProject and call project.Update()
3. Update the OutlineLevel of some of the tasks to make the "sub-tasks"

Steps 1 & 2 seem to be working fine.  I can open the project and I see all of my tasks, but step 3 blows up.  Can anyone give me a basic outline of the steps needed.