#175 TInvalidOperationException Error

[Anonymous]

I have used a login authorization tool from
the url
"http://www.xisc.com/wiki/index.php/A_Login_Authorization_Tutorial#LoginPage.tpl_Displays_the_Login_Page"
the section in that link is

Section C: Login Authorization using users loaded from
database

but is shows

"Component property 'TApplication.state' is not defined."

error .Please help me

Thanks in advance