Error in 70-667 setup directions?

I'm going through the Lab Environment Build Guide for the 70-667 self-paced training kit. In the Install SQL Server 2008 R2 section, Log on to SP2010-WFE1, and open Active Directory Users and Computers. I get the following error:

I am logged on as Administrator. Only thing I can think is that the SP2010-WFE1 computer isn't connecting to the domain. Help!
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