in dnn 7.0.0 for some tests i create two page called 'login' and 'register' same dnn default page and customize these pages with some modules. 

after this the popup login and popup register doesn't work in my portal

now i upgrade portal to 7.2.1 but popup login and popup register doesn't work and after click to this buttons, related pages load in postback. 

i do something to fix problem like: rename the pages, delete the pages, create another pages and use account login and account register module, 

but problem doesn't solve. 

any idea please to solve it.