New posts???

[Boss 5.0]

Ok, so every time I come here I click on the tab for "New Posts" so I can see the updated and new threads. Easily 50% of the time I will get a screen saying there are no new posts. If I then go to Quick Links then click on Todays Posts, same thing, 50% of the time I get nothing.

But, when I go to some individual categories on the forum I see that there are in fact updates or new threads.

Can someone explain why this is happening? Also, how can I fix it?

Thanks,
Glenn