Handling of this ADSVALUE type is not yet implemented

Anyone know how to work around the error message "Handling of this ADSVALUE type is not yet implemented (type = 0xb)"? I get this error when trying to access the value of one of the attributes in my ResultPropertyCollection object. Here's the code below. The error occurs when the For loop reaches a custom attribute. I've seen someone suggest "resPropCol(myKey)(0)" but this throws the same error. This only happens for the custom attributes on our LDAP server. My guess is that for some reason ADSI am not getting back the schema information for the custom attributes.

         Dim myKey As String
         For Each myKey In resPropCol.PropertyNames
             Dim tab1 As String = "    "
             Console.WriteLine(myKey + " = ")
             Dim myCollection As Object
             For Each myCollection In resPropCol(myKey)
                 Console.WriteLine(tab1 + myCollection)
             Next myCollection
         Next myKey