Registered Mono Modules Issue

Hi all, first, sorry if my question isn't clear enough or the header doesn't quite right. Because even i can't get exactly what my problem is...

• used vuforia (augmented reality) unity package for an ios app. when i launch my app, it's closing as soon as i see the splash screen. -the first scene doesn't have anything about vuforia. -i'm using Unity 4.5.4f1 and xCode 6.1.1 -here is the full log records when i launch the app within xCode;

2014-12-17 18:48:02.663 chpadayadaylari[470:50565] -> registered mono modules 0x1014db0 -> applicationDidFinishLaunching() Mono path[0] = '/private/var/mobile/Containers/Bundle/Application/13187C02-C313-4BEF-A265-AA7D2D4B2C38/chpadayadaylari.app/Data/Managed' Mono config path = '/private/var/mobile/Containers/Bundle/Application/13187C02-C313-4BEF-A265-AA7D2D4B2C38/chpadayadaylari.app/Data/Managed' -> applicationDidBecomeActive() (lldb)

• also get an "Exc_Bad_Access"

Note: when i use Unity 4.3 it works perfect except the asset bundle. If there is a way to make asset bundle works properly with unity 4.3, i'd use the old version again. (I export bundle packages properly and uploaded on my server. It works perfect for all other platforms but IOS... Ipad just doesn't download it and instantiate the main asset)