Hello....trying to set up twinning on MiVB 8.0 SP3 PR2 on a 6930 phone.  Have a Multi-Device User Group set up.  Trying to put the X*XXX Twin extension on a button on the base phone as GROUP PRESENCE, X*XXX.  I keep getting the error, "The directory number is of the wrong type".  I've verified X*XXX is in the MDU Group.  External Hot Desking Enabled is set to Yes.