ca final old to new?????

hi............i want to know whether if i write only one group in this november attempt and pass under the old syllabus.........i will be allowed to write the next group under the new syllabus next year???this doubt is because old syllabus last attempt is in november!!!!!!i want to know if passing in old syllabus only 1 group will be recognized......in new syllabus.....?????please clarify!!!!