asp.net mvc 3 - facebook redirect entering an endless loop -

i using v 5 rc , csmvc3facebookapp.sln sample.

when launch site locally (using iis express webserver) browsing to: http://apps.facebook.com/mytestapp homecontroller/index view shows properly. means facebook settings correct.

however when hit 'about' link (this facebook calls made) see endless loop occur between:

http://apps.facebook.com/santiagoit/home/about http://localhost:16874/facebookredirect.axd?code=

if user not logged in facebook. hitting 'about' link brings facebook login page, endless redirect loop happens after user signs in facebook.

i tested other sample projects , behave same. tested facebook test app , same results.

i had done project older facebook developer toolkit, new sdk.

any ideas going on?

thank you!

please take @ latest docs on authentication in facebook. have discontinued previous protocol authentication. use straight oauth2.