After login only blank page no more no less?

Hello Admin,

When i click a "LOGIN" button then enter my username and password i have encountered this:
http://blog.mysite.com/properlogin/ ---this appears on my url - then it's not opening even i refreshing it.

So, in order for me to see my site page i have to delete or remove the ff: --( /properlogin/) then only (http://blog.mysite.com) remains then it's okey.

My concern is, as far i have known it will automatically redirtect me to page site or to my admin site and shows the pages contents, but it's not supposed to happen just only a blank page no more no less. Unless i have to remove this: ( /properlogin/)

Please advise. Thanks a lot.
I already open the grant access on my account.