分开提交后为什么数据提交不到数据库呢？

做的是科研管理系统，页面如下图（很粗糙~凑合看吧）呵呵
单独每项提交到数据库，如果集中用一个提交，如果发表的论文有两篇只能提交两次了，所以就每项提交了（这是我想到的很笨的方法···）但是发现每项填完按下提交，数据不能传入数据库···
源代码截取两个事件如下：

 protected void sciebutton1_Click(object sender, EventArgs e)
    {
        string conn = "server=PC-201005131654;database=Project;user id=sa;pwd=123";
        SqlConnection cn = new SqlConnection(conn);
        cn.Open();
        /*科研表*/
        string strsqlsawar = "insert into scient_reward  (name,awards_level,rank,record) values ('" + scie_name.Text + "','" + awards_level.Text + "','" + scie_rank.SelectedItem.Text + "','" + scie_score.Text + "')";
        SqlCommand cmdsawar = new SqlCommand(strsqlsawar, cn);
        cmdsawar.ExecuteNonQuery();

    }
    protected void essayButton2_Click(object sender, EventArgs e)
    {
        string conn = "server=PC-201005131654;database=Project;user id=sa;pwd=123";
        SqlConnection cn = new SqlConnection(conn);
        cn.Open();
        /*论文表*/
        string strsqlessay = "insert into essay  (subject,public_class,record) values ('" + subject.Text + "','" + essay_level.SelectedItem.Text + "','" + essay_score.Text + "')";
        SqlCommand cmdessay = new SqlCommand(strsqlessay, cn);
        cmdessay.ExecuteNonQuery();
    }


谢谢各位了！