Links not working

I was about to revive my long dormant blog, when I discovered that it is no longer working. The front page ( http://www.theriveroflife.com ) is as it should be but none of the links to comments or to full posts are working. Could anyone tell me at a glance what is wrong? The strange thing is that I have hardly done anything to it which might have broken it. I used to get spam comments from time to time, of which I was notified by email, and I deleted these, but that was all I was doing. I can log in to site admin and access the comments and full posts from the dashboard. Using ‘manage’, ‘edit’ works but ‘view’ does not. Have asked my web host and they say it’s nothing they have done. Thanks for your help.