jQuery Grid Plugin - jqGrid

I created a User Form, where one of the fields is "Date of Birth"; 

I used the XML "DatePicker"  data-field for this attribute.

After inputing the information, I "SAVE" it. 

The problem is :  when I VIEW the page (re-load it in my browser), the date-of-birth disappears.  It isn't SAVED, for some reason.

Every other field is stored. But, the date of birth vanishes.

Is there something else that I ought to do with the "DatePicker", to ensure that it is saved in my system's repository?