Errors when updating PHPToolkit from 2013_1 to 2013_2

When I update from 2013_1 to 2013_2 I get the following errors:

Invalid RecordRef internalId for field SearchBooleanCustomField
Invalid RecordRef internalId for field SearchDoubleCustomField

Using:

            $isResellerSearch = new SearchBooleanCustomField();
            $isResellerSearch->internalId = 'custentity178';
            $isResellerSearch->operator = "isTrue";
            $isResellerSearch->searchValue = True;

            $latSearch = new SearchDoubleCustomField();
            $latSearch->internalId = 'custentity175';
            $latSearch->operator = "between";
            $latSearch->searchValue = $input["min_lat"];
            $latSearch->searchValue2 = $input["max_lat"];

How do I change these to accommodate 2013_2?