I'm going crazy with sheet metal detailing!

I have Solid Works 2007, SP5..and I'm trying to make a drw of it and my bending lines don't appear even tho they are activated. Or if I modify a config in the part and come back to drw I loose what I did. It's very frustating..been trying to make this drawing for over 2 hours now!

Is it SW that sucks with sheetmetal? Please help

SolidworksSheet Metal