title: iPhone Developing - Simulator and iOS Device Difference
body: <p>Firstly, im so sorry about my bad English :/</p>
  
  <p>I'm trying to develop a basic iPhone app (TAB VIEW) using with xCode  4.1
  In additional, I also used Three20 library in my project to make an image gallery.</p>
  
  <p>Here's my problem, i created all of app then i tested on simulator and everything works fine.
  But when i try on an iOS device (iPhone 4), there is nothing on the screen without tab controller. just gallery tab is working but other tabs are not working on device. These other tabs have buttons and imageviews thats all. I could click the tabs but nothing display without gallery tab.. </p>
  
  <p>It looks like a .xib view error but i couldnt solve it. 
  Whats ur advice? Thanks.. </p>