I'm attempting to retrieve contact "Field" properties. Most of the fields are coming back just fine, but on some I get "Index out of range", and I don't understand the error. For Example:

addr.Fields.Item("Last Name", GroupwareTypeLibrary.FieldTypeConstants.egwString) ;

retrieves the Last Name field just fine, but:

addr.Fields.Item("Assistant", GroupwareTypeLibrary.FieldTypeConstants.egwString) ; and
addr.Fields.Item("Assistant Phone", GroupwareTypeLibrary.FieldTypeConstants.egwString) ;

give me the "Index out of range" error.

Any ideas would be truly appreciated.