cookies not setting on Windows Mobile Embedded 6.5

I've got two Motola MC 9190 scanners. Set up as follows.

Scanner 1  - Windows CE 5.0, Wavelink Telnet CE 7.0.94 - Web emulation profile.
Scanner 2 - Windows Mobile 6.5, Wavelink Telnet CE 7.0.147 - Web emulation profile.

Can someone explain why Scanner 2 is unable to set and unset a cookie? Any help appreciated. This webpage works fine on iOS, Chrome, Firefox, Sanner1 using IE or Wavelink ..
The other odd thing is that if I use the Zetakey browser on Scanner 2, that works fine  and also the embedded IE browser works fine, it's just the Wavelink Telnet CE browser that doesn't work on Sanner 2

any help appreciated.

function setCookie(cname, cvalue)

{   

    document.cookie = cname + "=" + cvalue + ";";

}

function getCookie(cname)

{

    var name = cname + "=";

    var ca = document.cookie.split(';');

    for(var i=0; i<ca.length; i++) {

        var c = ca[i];

        while (c.charAt(0)==' ') c = c.substring(1);

        if (c.indexOf(name) == 0) return c.substring(name.length,c.length);

    }

    return "";   

    //return $.cookie(cookieName); ----> I've had to remove the jQuery code because it just doesn't like this either!

}