Hey guys :)

I've read the manual (twice :p ) and am having trouble starting the engines.  As you might imagine, this is a very important step to flying.  Up to now, I've mostly been working my way through the manual and starting via CTRL+E, but after several attempts I can't think what I'm doing wrong.  I use the checklist, boot up in the default Cessna to put the prop and mixture levers forward, and work through all the parts of the checklist.  I noticed a couple of things which might be doing it.

First of all, hydraulic system A doesn't have any pressure.  Should it, before the engines are started?  

I can't think what I'm doing wrong, but I'd love some help.  Where should I start?  Screenshots of the panels, perhaps?

Thanks for your help!

Kevin