Updating the database with newly inserted row using oledb

Question

Hi, I'm a beginner in vb .net. When I tried to update the database with the newly inserted row using update method.. adapter.update(dataset1,"tablename") I'm not getting any errors. But the updation is not taking place. If the database is checked for update, only the already existing rows are present. The new row is not inserted. kindly let me know how to proceed. Thank you.