Range Validator in vb.net

I am trying to validate a year between 1900 - current Year 
I tried Below ways which did not work. can any one correct me.

<asp:RangeValidator ID="RangeValidator1" runat="server" ControlToValidate="txtYr" ErrorMessage="*" MaximumValue='<%# DateTime.Now.Year %>' MinimumValue="1900"></asp:RangeValidator> I also Tried in the page Load Code Behind
rangevalidator1.minimunvalue=1900 rangevalidator1.Maximumvalue= datetime.now.year