cannot load value to datebox in form

[Opan Mustopah]

hello again,

why i cant load value to datebox in a form?
i already do this:

Code:

$("#dlg_user_profile").form('load',{
							user_name: user.user_name,
							themes: user.themes,
							email: user.email,
							mobile: user.mobile,
							twitter_account: user.twitter_account,
							birthdate: user.birthdate  // <=== easyui-datebox input
						});

but when i check, datebox value become date today? how to solve this issue?

thanks in advance