Debug Symbols xcode 4.2 on iOS 4.3 Device

[TTStu]

Trying to build an old app using xcode 4.2 and iOS 5 on an iPhone running iOS 4.3

The app loads as far as the splash screen and then hangs forever.

There is no error, but the console is full of "Unable to fetch debug symbols for..." and lists loads of libraries, including common ones such as UIKit and foundation.

Yes I have set armv6/7 and deployment target is 4.0

It appears it can't find the debug files, even though I found the folder...

I went into preferences->downloads and see that I can choose to download debug files for ios 4.0 to 4.1

However, every time I try to install this package, the network times out. All other network functions remain active... is this an Apple server issue or is there perhaps a way I can force this manually?

Incidentally, when I tried previously to run on a 3.x device, it automatically grabbed the 3.x debug symbols, and that then worked fine...