iPhone crashes on splash screen

Hi everyone,

I'm working on my final year project for university which is to build a game for iPhone using Unity. I bought my iOS developer licence today and I'm trying to get the thing running on an iPhone for the first time. When I run the project I get no errors in either Unity or Xcode and it installs to the device fine. When it says "running application" in Xcode the iPhone does nothing. When I try to run it manually on the iPhone by opening the application it gets to the "powered by Unity" splash screen and then crashes back to the springboard.

The only output trace in Xcode is:

"error: failed to launch '/Users/Ciaran/Library/Developer/Xcode/DerivedData/Unity-iPhone-cruezpmfviqpttcekdglqekltgps/Build/Products/HungryUg.app/HungryUg' -- No such file or directory (/Users/Ciaran/Library/Developer/Xcode/DerivedData/Unity-iPhone-cruezpmfviqpttcekdglqekltgps/Build/Products/HungryUg.app/HungryUg)"

I have 3 more weeks before I have to finalise the project and Im starting to sweat a little!! Any ideas?