duniacctv

hi everyone... im new to the dvr stand alone system...i really need assitance in getting the DVR KPD674ZB to be able to view remotely via internet...i have successfully access it via internet....but the problem is....after about 30minutes or so...it always need to sign in again....i've set the access to unlimited access...and all the browser setting to keep logged in....but it still fails to connect...please if you have any idea on how to solve these problems...i'll really appreciated it...thank youu