setting min date in jquery datepicker

Hi i want to set min date in my jquery datepicker to (1999-10-25) so i tried the below code its not working.

$(function () {
     $('#datepicker').datepicker({
         dateFormat: 'yy-mm-dd',
         showButtonPanel: true,
         changeMonth: true,
         changeYear: true,
         showOn: "button",
         buttonImage: "images/calendar.gif",
         buttonImageOnly: true,
         minDate: new Date(1999, 10 - 1, 25),
         maxDate: '+30Y',
         inline: true
     });
 });
 

** if i change the min year to above 2002 than it will work fine but if i specify min year less than 2002{like above eexample 1999} it will show only up to 2002.can someone help me. i am using jquery-1.7.1.min.js and jquery-ui-1.8.18.custom.min.js.

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