那就把这句删除

 If UserIPTF=1 and not Conn.Execute("Select ID From KS_PhotoVote Where ChannelID=" & ChannelID & " And ClassID='" & ClassID & "'").eof  Then
    Response.Write "<script>alert('对不起，您已投过票，不能再投！');history.back();</script>"
    Response.End()
 End If