The modal window is not called from the partial view, but a new window is opened, why is that?

Question

ASP.NET

I call the modal from the `Guns.cshtml` partial view, the `Guns.cshtml` partial view is loaded via Ajax into the `Main.cshtml` partial view.

@using (Ajax.BeginForm("Guns", "Admin", new AjaxOptions { UpdateTargetId = "active" }))
        {
            <input class="btn btn-success btn-lg adminbtn" type="submit" value="Оружия" />   
        }

After I have a table with products and there is a button for each product:

@Html.ActionLink("Редактировать", "Edit", "Admin", new { id = 1 }, new { @class = "gunitem btn btn-info" })

On click, a new page opens with my "Edit" partial view.
BUT!
If I put my button in _Layout.cshtml then it works great. What am I doing wrong?