Self made server | "Connecting" Problem

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VB

Hello guys.
This is my first post so please forgive me for any error.
Ok I am making a Online Yu-Gi-Oh card game with vb.net
So first I made the server (a free webhost) then I made a signup form with MD5 hash encryption (Not decryptable)that creates a file in the host with the Username as its name, and encrypted password as its text.

This works fine but the problem is my Log In code.
It does not seem to work.

Dim username As String
    Dim passwordclient As String
    Dim passwordserver As String
    Dim encrypted As String

'Login Button (Click)
    Private Sub loginbutton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles loginbutton.Click
        loginbutton.Image = My.Resources.largeButton_orange_down

        'Check if blank
        If TextBox1.Text.Length = 0 Or TextBox2.Text.Length = 0 Then
            MsgBox("One of the fields is blank.")
            Exit Sub
        Else
            username = TextBox1.Text
            passwordclient = TextBox2.Text
        End If
        encrypted = StringToMD5(passwordclient)

        'Server connection
        WebBrowser1.Navigate("http://yugioh.hes78.com/" & username)
        'Goes to WebBrowser1_DocumentCompleted

End Sub

Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles WebBrowser1.DocumentCompleted
        
passwordserver = WebBrowser1.DocumentText

        If encrypted = passwordserver Then
            Form2.Show()
            Me.Hide()

        Else
            MsgBox("Error")
        End If

    End Sub

It always shows the error msgbox at the end, when I click the login button.
Thanks.