Unable to modify group membership

Unable to modify group membership

I keep getting an error when I try to add myself to a domain security group.
I am a domain administrator so rights should not be a problem.
Here is the error I keep getting:
 
 5 -Access is denied (Terminal Service / Folder Creation)

 

    Reasons:

  1. User does not have rights to create a homefolder.

  2. Users do not have access over terminal services.   
Can you tell me what I may be doing wrong?
 
Thank you!
KBeauchaine

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