title: TTCatalog (Three20) wont run
body: <p>I'm trying to run the Three20 sample app TTCatalog.
  Its compile without errors, but I cant install it in my iPHone or Simulator, it just wont run.
  I try using Cmd + R, but nothing. Then I go to product to make it run from there, but the Run word is not able to use it.
  I suppose that I set something in te project to make it works, but I dont know what it is.</p>
  
  <p>I have XCode 4.1 on OS X Lion. And I download the project from GitHub (https://github.com/facebook/three20) in a zip file.</p>
  
  <p>Any help will be very appreciate :)</p>