Inventor isn't letting me use the revolve tool. I got the work axis and the sketch. I attached my part here so you guys can check it out I also attached the file that tells you how the revolve should look like
I can't open your part because I'm on IV 2013. You should add your software version and some basic computer specs to your signature so everyone has it available when they are trying to help.
That being said... can you draw the rotational axis as part of the sketch using the centerline tool? Does it work then? I believe with the revolve tool you can only specify origin axes and sketch entities but someone will have to verify that.
Your Sketch7 does not form a closed profile and it doesn't look like the instructions you posted?
I recommend that you go through these
http://home.pct.edu/~jmather/SkillsUSA%20University.pdf
http://inventortrenches.blogspot.com/p/inventor-tutorials.html
http://wikihelp.autodesk.com/enu?adskContextId=HELP_TUTORIALS&language=ENU&release=2014&product=Inve...
The CADWhisperer YouTube Channel