binding source is inaccessible due to its protection level

Hi, this is the original code that I'm using

this.studentBindingSource.AddNew();

but I want it to execute when I click the linklabel i'm using from another form so I tried using this and I get the error

frmRegister freg = new frmRegister();

        private void lblSignup_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            freg.studentBindingSource.AddNew();
            freg.ShowDialog();
            this.Hide();
        }

TIA