private void btnLogOn_Click(object sender, System.EventArgs e)
{
Response.Write("<script>");
Response.Write("window.open('" + "ftp://" + txtDomain.Text + "\\" + txtUser.Text + ":" + txtPassword.Text + "@10.10.1.31" + "')");
Response.Write("</script>");
}

pri nashatii na knopku berem dannie s TextBox i pitaestya zaiti na Ftp Server. NO pochemy to vidaet snova okno FTp i sprashivaet parol i imya usera. i tolko posle etogo zaxodit na personal folder dannogo usera na FTP. V chem moshet bit problema?