iPhone app crash on load, but runs from XCode build

Hey folks, I know this is vague. I was hoping that someone might have a general idea as to what where the problem might be...

I'm porting over a game that we've made to the iPhone, and I'm testing it on a first generation iPod touch. when i do a build from unity, xcode installs the app on my iPod fine and it runs well. however, if i want to load the app manually from the iPod home menu, it crashes on load.

confuses the heck out of me. What would cause the app to run fine from an xcode build but not by being opened manually?

Probably your first scene is loading too long. Please take a look at http://unity3d.com/support/documentation/Manual/TroubleShooting.html#iPhoneTroubleShooting "Xcode Organizer console contains "killed by SpringBoard" section.