using tradition membershipprovider but login control asp.net

we have got tradition membershipprovider asp.net. there 2 illusory unfolding user validated:

1. user login around login.aspx page entering username/password. i have used login control related mymembershipprovider. operative ideally fine.




2. an authentication token upheld around url query twine form opposite web sites. i have profusion membershipprovider.validate(string authenticationtoken), indeed validating user. box can't login control. i same membershipprovider countenance user but indeed controlling login control? i attempted validate manually, nonetheless signing user in.

here formula dash i am controlling

if (!string.isnullorempty(request.querystring["authenticationtoken"])) {
    twine sheet = request.querystring["authenticationtoken"];
    mymembershipprovider provider = membership.provider mymembershipprovider;
    (provider != null) {
        (provider.validateuser(ticket))
            // login success
        else
            // login fail
    }
}