According to http://msdn.microsoft.com/library/default.asp?url=/library/en-us/adsi/adsi/iadsaccesscontrollist_addace.asp and http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ad/ad/example_code_for_creating_a_security_descriptor.asp your ACLs are not being comitted.
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There are two types of vessels, submarines and targets.