Can't auto update – is it my hosting or an error with the plugins, or something else?

I selected ‘autoblog’ because it is ONE of the plugins that won’t auto-update. My question is, however, that none of them do.

I wonder if I have a hosting setting that is preventing the communication of my site with plugin updates, or if I have to manually download and upload ever danged plugin, if anyone could get back to me, that would be awesome.

-dave wood