Strange Logging In

When a member logs in on a particular page lets say the view video url, then the site lets you log in and it's fine and shows you logged in but not on the page you actually logged in on? So once logged in it displays you are in as 'username' bla bla bla but go back to the view video page from where you initially logged in on and it still shows the page as a visitor? 'welcome guest text'

Any ideas anyone.....

By "go back," do you mean via your browser's back button?

Sorry, either way it's wierd wherever I log in on the site then that page still displays me as if I am not logged in still giving me the option to either 'log in or join' but all other pages are displaying me as logged in? This is the same on any page I have recently browsed as a non member so if I go through, say the home page and check out someones profile page as a non member then log in these two pages are basically out of bounds to intergrate with as a member?? still prompting me to join or sign in???

So even going back in browsers back button or simpoly clicking to and from and back again to previously viewed pages as a non member it all still the same throughout.

Very frustrating??

Thanks..