I'm currently trying to sell mobile websites online. The problem is that I can't get past the mockup stage no matter who I talk to. I've tried local, non-local, and international. What happens is that I will seek the potential client or the potential client will seek me out, we will discuss what they want, I present a mockup, and I never hear from them again. I used to sell non-mobile websites and design and have never encountered that. It is a huge waste of time and I wonder what the problem is. I plan to cold call for the first time today and I'm move nervous about the waste of time problem than I am with talking. Does anyone have some advice?