Websecurity login not logged success althogth I have same user name and password on membership table ?

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C#

SQL

T-SQL

I working on c# web application i use the following code to login
but it not logged success

it show model state error although i have same user name and password on database
so how to solve this issue please

so when make break point to WebSecurity.Login it not go to inside if statement
it go to

ModelState.AddModelError

i have same user name and password that exist on table webpages_Membership
so what i do to solve issue please

What I have tried:

public JsonResult Login(LoginModel model, string returnUrl)
        {
            if (WebSecurity.Login(model.UserName, model.Password, model.RememberMe))
            {

            }

            ModelState.AddModelError("", "error");
            return Json(new { Ok = false, Message = main.LoginError, status = "activated" });
        }