Javascript cookies set not working for specific country

Question

I have tried to set cookies using JavaScript in my website, Its working fine for me in india, But when some access the same for US, the cookies not setting up.

    var sso_cookie = {
      name : 'id',
      token: 'wfsXsdfe32S',
      domain: '.mysite.com'
    };
    var d = new Date();
    d.setTime(d.getTime() + (30 * 60 * 1000));
    var expires = "expires=" + d;

    document.cookie = "_id=" + sso_cookie.token + ";" + expires + ";domain="+sso_cookie.domain+";path=/";
    document.cookie = "_auth=" + true + ";" + expires + ";domain="+sso_cookie.domain+";path=/";

We tried with various laptops and system in US region but no luck.