C#访问Oracle,出现错误提示:表不存在!可是表实际上是存在的,请高人指点!谢谢

                        //初始化数据集
try
{
this.oleDbDataAdapter1.Fill(this.dataSet1,"HUAMN");
this.textBox1.DataBindings.Add("Text",this.dataSet1,"HUAMN.HUAMN_ID");
this.textBox2.DataBindings.Add("Text",this.dataSet1,"HUAMN.NAME");
this.MyBind=this.BindingContext[this.dataSet1,"HUAMN"];
}
catch(Exception Err)
{
MessageBox.Show("打开数据库表错误："+Err.Message,"信息提示",MessageBoxButtons.OK,MessageBoxIcon.Information);
return;
}