How do I fix Not logged in FTP in VB?

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VB

Visual-Studio

VS2010

Im trying to make a picturebox display an image from an ftp server, but I keep getting the error: The remote server returned an error: (503) Not logged in. Anyway to fix? Here is the code

Try
            Dim wc As New WebClient
            Dim bytes As Byte() = wc.DownloadData("ftp://rustledatabase.x.gg/testpic.jpg")
            Dim imgsteam As New MemoryStream(bytes)
            PictureBox2.Image = Image.FromStream(imgsteam)
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try