Unable to insert data in to mysql using data proces in grid

Hi Team,

In dhtmlx grid i can populate the data from mysql db using data connector (Java).

i have added the add and remove button to the grid but when i add some data to the fields it not displayed in the database. When i hit the query in db i can see blank rows are added in the db without data.

could any one guide me how to add / delete /update data into mysql db ?