looking at the units, I need joules=Kg*m^2/s^2 . where will I get s^2 when I only have angular velocity
I think the issue you're having is because you had the equation for rotational KE slightly wrong, as I mentioned above.
By the way, I'm glad you looked at the units. Always keep track of the units. it's a great way to make sure your work is making sense, and to catch errors. If things aren't dimensionally consistent on both sides of an equation, then chances are you've made an error.