How to add a new entry into table using a!writeRecords?

Hi,

I am trying to use a!writeRecord function in an interface button save into block. Below is my code. Id is a Primary Key and is set as AUTO_INCREMENT in the database table. When I set the id as 0, it doesn't seem to accept the identifier and hence fails. What should I do in order to write a new entry into the table using this function?

PS : I am able to update the record and the corresponding row in the DB with an existing identifier.