Keyboard event handling error

cannot assign to 'keydown' because it is a 'method group'

Form1.Keypress(object, KeyPressEventsArg)' hides inherited method 'Control.KeyPress'. Use the new Keboard if hiding was intended 

private void KeyDown(object sender, KeyEventArgs e)
       {
           if(e.KeyCode == Keys.Enter)
           {
               MessageBox.Show("Enter Key Pressed");
           }
       }

       private void KeyUp(object sender, KeyEventArgs e)
       {

       }

       private void KeyPress(object sender, KeyPressEventArgs e)
       {
           if(e.KeyChar == (char)Keys.Enter)
           {
               MessageBox.Show("Enter was pressed");
           }
       }

private new void KeyDown(object sender, KeyEventArgs e)
        {
            Input.ChangedState(e.KeyCode, true);
        }

        private new void KeyUp(object sender, KeyEventArgs e)
        {
            Input.ChangedState(e.KeyCode, false);
        }

public static Hashtable KeyBoard = new Hashtable();

public static bool KeyPressed(Keys key)
{
    if (KeyBoard[key] == null)
    {
        return false;
    }
    else
    {
        return (bool)KeyBoard[key];
    }

}
public static void ChangedState(Keys key, bool state)
{
    KeyBoard[key] = state;
}