NoClassDefFoundError: com.qualcomm.ar.pl.CameraPreview

Hi! I have problems with the sample apps (all of them): right after the app starts it crashes immediately with a NoClassDefFoundError. I modified the java code to catch the error by inserting a new catch into the [I]public static boolean loadLibrary(String nLibName)[/I] function, so now I'm getting the following error (I also printed out the stack trace): 04-01 21:15:19.622: ERROR/QCAR(4985): The library libQCAR.so could not be loaded: com.qualcomm.ar.pl.CameraPreview 04-01 21:15:19.622: WARN/System.err(4985): java.lang.NoClassDefFoundError: com.qualcomm.ar.pl.CameraPreview 04-01 21:15:19.622: WARN/System.err(4985): at java.lang.Runtime.nativeLoad(Native Method) 04-01 21:15:19.622: WARN/System.err(4985): at java.lang.Runtime.loadLibrary(Runtime.java:432) 04-01 21:15:19.632: WARN/System.err(4985): at java.lang.System.loadLibrary(System.java:554) 04-01 21:15:19.632: WARN/System.err(4985): at com.qualcomm.QCARSamples.Dominoes.Dominoes.loadLibrary(Dominoes.java:796) 04-01 21:15:19.632: WARN/System.err(4985): at com.qualcomm.QCARSamples.Dominoes.Dominoes.(Dominoes.java:107) 04-01 21:15:19.632: WARN/System.err(4985): at java.lang.Class.newInstanceImpl(Native Method) 04-01 21:15:19.632: WARN/System.err(4985): at java.lang.Class.newInstance(Class.java:1409) 04-01 21:15:19.632: WARN/System.err(4985): at android.app.Instrumentation.newActivity(Instrumentation.java:1021) 04-01 21:15:19.632: WARN/System.err(4985): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1573) 04-01 21:15:19.632: WARN/System.err(4985): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1675) 04-01 21:15:19.632: WARN/System.err(4985): at android.app.ActivityThread.access$1500(ActivityThread.java:121) 04-01 21:15:19.632: WARN/System.err(4985): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943) 04-01 21:15:19.632: WARN/System.err(4985): at android.os.Handler.dispatchMessage(Handler.java:99) 04-01 21:15:19.632: WARN/System.err(4985): at android.os.Looper.loop(Looper.java:123) 04-01 21:15:19.632: WARN/System.err(4985): at android.app.ActivityThread.main(ActivityThread.java:3701) 04-01 21:15:19.632: WARN/System.err(4985): at java.lang.reflect.Method.invokeNative(Native Method) 04-01 21:15:19.632: WARN/System.err(4985): at java.lang.reflect.Method.invoke(Method.java:507) 04-01 21:15:19.632: WARN/System.err(4985): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:862) 04-01 21:15:19.632: WARN/System.err(4985): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620) 04-01 21:15:19.632: WARN/System.err(4985): at dalvik.system.NativeStart.main(Native Method) 04-01 21:15:19.632: WARN/System.err(4985): Caused by: java.lang.ClassNotFoundException: com.qualcomm.ar.pl.CameraPreview in loader dalvik.system.PathClassLoader[/data/app/com.qualcomm.QCARSamples.Dominoes-2.apk] 04-01 21:15:19.642: WARN/System.err(4985): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240) 04-01 21:15:19.642: WARN/System.err(4985): at java.lang.ClassLoader.loadClass(ClassLoader.java:551) 04-01 21:15:19.642: WARN/System.err(4985): at java.lang.ClassLoader.loadClass(ClassLoader.java:511) 04-01 21:15:19.642: WARN/System.err(4985): ... 20 more Now I can see the splash screen but after that it closes without any message. As you can see, there is some problem with com.qualcomm.ar.pl.CameraPreview My phone is a SonyEricsson X10i with Android version 2.3.3 I am using the latest Vuforia SDK 1.5.9 and Android NDK r7b. About half year ago I was successfully able to try the sample projects on this phone with Android version 2.1.update-1 and the former QCAR SDK 1.0.6 and NDK r6b. Can you help me solving this error? Thanks in advance, Attila