Hi !
well basically we had the same idea (to try with a simpler circuit), but even your first example doesn't work for me (after replacing the pins numbers by mine of course) 
I tried a lot of things like using digitalWrite instead of analogWrite, without setting the enablePin to HIGH in the setup, setting only the first control pin to OUTPUT (like you did in your example), but nothing makes it work ! :0 I even tried to change the place of everything on the breadboard, but no luck...
By looking at the photograph, can you see any obvious error that I may be missing ? I also wish I had a multimeter, but where I work people aren't really into electronics, so wey lack even of the fundamental tools... =( I'm probably going to buy one tomorrow morning, I'll tell you what are the results...