Form Validation

 I have a textbox in a form and want to validate it.  It is the first line of an address i.e. 30 Any Street
 
I can get it to accept Any Street but not the number 30.  This is what I have
 <asp:RegularExpressionValidator ID="RegularExpressionValidator14" runat="server"
                                ControlToValidate="AddressLine1TextBox" Display="Dynamic"
                                ErrorMessage="Please use upper and lower case with spaces and numbers"
                  &n ...