BindingSource error

hi,

I get a compilation error in the follwoing code.

errors:
Error      1      An object reference is required for the non-static field, method, or property 'System.Windows.Forms.BindingSource.DataMember.get'

Error      2      An object reference is required for the non-static field, method, or property 'System.Windows.Forms.BindingSource.DataSource.get'

code:
 private void Form1_Load(object sender, EventArgs e)
        {
            DBO db = new DBO();
            BindingSource.DataMember = "Sample";
            BindingSource.DataSource = db;
            this.reportViewer1.RefreshReport();

        }

How can I solve the problem?

Please help

ayha