I need to click through the class on a button in the webbrowser of visua basic

So I'm trying to click the button for the class using the visual basic webbrowser with this code here, but it just does not click and I do not understand why .. if you can help me, thank you.

Dim PageElement1 As HtmlElementCollection = WebBrowser1.Document.All.GetElementsByName("btn btn-primary")
        For Each CurElement1 As HtmlElement In PageElement1
            CurElement1.InvokeMember("click")
        Next

this is the button code on the site

<button type="submit" class="btn btn-primary">Entrar</button>