Remote validation not woking

Question

Hi all,i try this code for checking username already is there are not

 

public ActionResult CheckForDuplication(string UserName)

{

SqlConnection con = new SqlConnection(s);

SqlCommand cmd = new SqlCommand("Sp_CheckForDuplication", con);

cmd.CommandType = CommandType.StoredProcedure;

cmd.Parameters.AddWithValue("@UserName", UserName);

SqlDataReader dr = cmd.ExecuteReader();

if (dr.HasRows)

{

return Json("Sorry UserName not aviable", JsonRequestBehavior.AllowGet);

}

else

{

return Json(true, JsonRequestBehavior.AllowGet);

}

 

 

and in my model

 

[Required(ErrorMessage = "*")]

[StringLength(20, MinimumLength = 4, ErrorMessage = "Must be at least 4 characters long.")]

[Remote("CheckForDuplication", "OutLet", HttpMethod = "POST", ErrorMessage = "User name already exists. Please enter a different user name.")]

so when i m trying to execiute it it wont hits the method ..any help please

 

thanks and regards