hamoper

I have a speco dvr-4tl and an apple timecapsule router. A few days ago all was working but today I can no longer view cameras while at home as well as through the internet. The only way I can view the cameras is through my monitor at home. I am running windows 7 as the os. I have checked the menu for networking and all appears fine. I suspect the issue is with the apple timecapsule router. Anyone have any ideas as to what settings I should check on the router and where?? Thanks