How hard is this to operate? I just picked one up from ebay and when it arrived, I just can't seem to get it to fire. Doesn't the ready lamp just come on automatically? My ready lamp has never been on and I haven't fired one flash yet. I am trying to find more information - maybe my settings are wrong, but it would seem cumbersome to have to make sure I have the right settings every time. Sorry guys this is my first speedlight - I normally don't even use one because I take all my photos outdoors and in bright light.