No parameterless constructor defined when accessing web service

[AexioLSS]

Can not figure out what I am doing wrong.Controller Code.\[code\]public class HomeController : Controller{ private readonly SoapWebService _db; public HomeController(SoapWebService db) { _db = db; } public ActionResult Index() { return View(_db.GetAllItems("APIKey").ToList()); } }\[/code\]View Code\[code\]@model IEnumerable<ProjectName.ServiceName.ItemName>@foreach (var item in Model) { @Html.DisplayFor(item => item.Title)}\[/code\]ErrorNo parameterless constructor defined for this object.Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.MissingMethodException: No parameterless constructor defined for this object.Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.