Have you tried running one of the samples (e.g. ImageTargets ). This will help to determine whether it's your app that is the problem.

this?
No JNI_OnLoad found in /data/data/com.v.d/lib/libQCARWrapper.so 0x4051d720, skipping init
No JNI_OnLoad found in /data/data/com.v.d/lib/libQCARUnityPlayer.so 0x4051d720, skipping init

Could this be th e problem?

Hi again, maybe this could be of use:
This is log from device:
03-07 11:19:51.334: I/ActivityManager(14746): Starting activity: Intent { flg=0x10000 cmp=com.v.d/com.qualcomm.QCARUnityPlayer.QCARPlayerNativeActivity (has extras) } from pid 18477
03-07 11:19:52.786: W/ActivityManager(14746): Force finishing activity com.v.d/com.qualcomm.QCARUnityPlayer.QCARPlayerNativeActivity
03-07 11:19:53.286: W/ActivityManager(14746): Activity pause timeout for HistoryRecord{4089dd88 com.v.d/com.qualcomm.QCARUnityPlayer.QCARPlayerNativeActivity}
03-07 11:19:55.949: I/ActivityManager(14746): Process com.v.d (pid 18477) has died.
03-07 11:19:55.949: I/WindowManager(14746): WIN DEATH: Window{40b4ba88 com.v.d/com.qualcomm.QCARUnityPlayer.QCARPlayerNativeActivity paused=false}
03-07 11:20:03.536: W/ActivityManager(14746): Activity destroy timeout for HistoryRecord{40bd8c18 com.v.d/com.qualcomm.QCARUnityPlayer.QCARPlayerProxyActivity}
03-07 11:20:03.536: W/ActivityManager(14746): Activity destroy timeout for HistoryRecord{4089dd88 com.v.d/com.qualcomm.QCARUnityPlayer.QCARPlayerNativeActivity}

hi, Kim!

Thanks for your reply.
I'm developing on Windows and then running on HTC Sensation. When I check the log with ddms I can see only that my app was started and nothing else??

Are you developing on Windows? Look into HTC Sync if you aren't already using it.

When you say the application won't start, what device are you running it on? Note that Vuforia applications cannot run in the emulator. Look for errors in the device log if it is force closing on a device. You can find the log by running the DDMS tool that comes with Android.

- Kim