No data for this table

I installed piwik a few days ago, and I have been having problems with viewing my data. I know that it is being collected correctly, because I can sometimes see it - but more often than not it is saying ‘no data for this table’. The dashboard usually works, but more detailed data rarely does, nor do the week/month/year views.

I searched through this forum, but the only answer I could find was to make sure that thee server time zone was correct. I have done this, and still no change.

What can I do to fix this? It’s really annoying only being able to see stats half the time.