Exception when using ASP.NET MVC and Entity Framework

Very new to ASP.NET MVC and Entity Framework.

I'm trying to set up a database with three tables, when I run my code and go to the page "Tickets", I get the following exception:

There is already an open DataReader associated with this Command which must be closed first.

Class 1

public class Ticket
{
    [Key]
    public int ID { get; set; }
    public string Description { get; set; }
    [ForeignKey("Practice")]
    public int PracticeID { get; set; }

    public string Contact { get; set; }
    public string Category { get; set; }

    //insert Support type using ViewBag (Support type listed in Models.Practices)
    [DataType(DataType.DateTime)]
    [DisplayFormat(DataFormatString = "{0:dd-MM-yyyy}", ApplyFormatInEditMode = true)]
    public DateTime Due { get; set; }

    [DataType(DataType.DateTime)]
    [DisplayFormat(DataFormatString = "{0:dd-MM-yyyy}", ApplyFormatInEditMode = true)]
    public DateTime TimeLogged { get; set; }

    [ForeignKey("Consultant")]
    public int ConsultantID { get; set; }
    public string ConsultantName { get; set; }
    public string Status { get; set; }

    public virtual Practice Practice { get; set; }
    public virtual Consultant Consultant { get; set; }
}

Class 2:

public class Practice
{
    [Key]
    public int PracticeID { get; set; }
    [Display(Name = "Practice Name")]
    public string PracName { get; set; }
    [Display(Name = "Practice Number")]
    public int PracNumber { get; set; }
    public string Contact { get; set; }

    [Display(Name = "Support Type")]
    public string Support { get; set; }
    public string Tel { get; set; }
    public string Cell { get; set; }

    [DataType(DataType.EmailAddress)]
    public string Email { get; set; }
    public string Address { get; set; }
    public virtual List<Ticket> Ticket { get; set; }
}

Class 3:

public class Consultant
{
    [Key]
    public int ConsultantID { get; set; }
    public string Name { get; set; }

    [DataType(DataType.Password)]
    public string Password { get; set; }

    public string Role { get; set; }
    public virtual List<Ticket> Ticket { get; set; }
}

I have a search function in my TicketsController:

public ActionResult Index(string searchString, string Consultants)
{
        var UserLst = new List<string>();

        var UserQry = from d in db.Consultants
                      orderby d.Name
                      select d.Name;

        UserLst.AddRange(UserQry.Distinct());
        ViewBag.User = new SelectList(UserLst);

        var tickets = from m in db.Ticket
                      select m;

        if (!String.IsNullOrEmpty(searchString))
        {
            tickets = tickets.Where(s => s.Description.Contains(searchString));
        }

        if (!string.IsNullOrEmpty(Consultants))
        {
            tickets = tickets.Where(x => x.ConsultantName == Consultants);
        }

        return View(tickets);
    }

The error seems to be coming from the HTML code in the INDEX.

@model IEnumerable<MAD.Models.Ticket>

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>




<p>
    User: @Html.DropDownList("User", "All")
    Description: @Html.TextBox("SearchString") <br />
    <input type="submit" value="Search" />
</p>


<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.Consultant.Name)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Practice.PracName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Description)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Contact)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Category)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Due)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.TimeLogged)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Status)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.Consultant.Name)--ERROR CODE
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Practice.PracName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Description)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Contact)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Category)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Due)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.TimeLogged)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Status)
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id=item.ID }) |
            @Html.ActionLink("Details", "Details", new { id=item.ID }) |
            @Html.ActionLink("Delete", "Delete", new { id=item.ID })
        </td>
    </tr>
}
</table>