Remove-ADObject -- Access Is Denied

I have an array of computer objects which need to be deleted from Active Directory. This is going to be setup as a scheduled task, so I will not be able to interact with the script once it is fully deployed.  I am doing my testing within PowerShell ISE and the following are the steps I have gone through so far. 

1)

foreach ($computer in $inactiveComputers)
{
  Remove-ADComputer -Identity $computer.Name
}

Opens a dialog box asking to confirm to delete objects.  Will not work as I require it to run with no user interaction.

2)

foreach ($computer in $inactiveComputers)
{
  Remove-ADComputer -Identity $computer.Name -Confirm:$false
}

Error Caught:

The directory service can perform the requested operation only on a leaf object

3)

foreach ($computer in $inactiveComputers)
{
  Get-ADComputer $computer.Name | Remove-ADObject -Recursive
}

Opens a dialog box asking to confirm to delete objects.  Will not work as I require it to run with no user interaction.

4)

foreach ($computer in $inactiveComputers)
{
  Get-ADComputer $computer.Name | Remove-ADObject -Recursive -Confirm:$False
}

Error Caught:

Access is Denied

5)

Reopened PowerShell ISE as an administrator and ran the same set of commands again

Error Caught:

Access is Denied

Note: 

The computer objects are NOT protected by accidental deletion. 

Some thoughts on how to accomplish this would be great. 

Colin Domansky