请教,急
private   void   button1_Click(object   sender,   System.EventArgs   e)
{

                        Process.Start( "rasdial ",   "hs   zxj10   zxsys ").WaitForExit();

string   conn   =   "user   id=sa;data   source=\ "209.160.11.129\ ";password=zx564011;initial   catalog=ALMSYS ";
SqlConnection   thisConn   =   new   SqlConnection(conn);
thisConn.Open();

SqlDataAdapter   adapter   =   new   SqlDataAdapter( "Select   content   from   alarm   where   code=3072 ",thisConn);
MessageBox.Show( "Step1   ");
      thisConn.Close();

adapter.Fill(dataset);
MessageBox.Show( "Step   2 ");

dataGrid1.DataSource   =   dataset;

                        Process.Start( "rasdial ",   "hs   /d ").WaitForExit();

}
}

通过vpn连接,取数据库中的数据,然后断开.
第一次点击成功,第二次总是失败,为什么

------解决方案--------------------
你自己把连接都关了啊，thisConn.Close(); dapter.Fill(dataset);