getting NoClassDefFoundError on runtime

[jd-gupta27]

07-15 12:40:44.479 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.UploadsListFragment$UploadedVideoAdapter', referenced from method com.google.ytdl.UploadsListFragment.onConnected
07-15 12:40:44.487 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.UploadsListFragment$UploadedVideoAdapter', referenced from method com.google.ytdl.UploadsListFragment.setVideos
07-15 12:40:44.502 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.util.ImageWorker$AsyncDrawable', referenced from method com.google.ytdl.util.ImageWorker.getBitmapWorkerTask
07-15 12:40:44.502 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.util.ImageWorker$CacheAsyncTask', referenced from method com.google.ytdl.util.ImageWorker.addImageCache
07-15 12:40:44.510 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.util.ImageWorker$CacheAsyncTask', referenced from method com.google.ytdl.util.ImageWorker.clearCache
07-15 12:40:44.510 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.util.ImageWorker$CacheAsyncTask', referenced from method com.google.ytdl.util.ImageWorker.closeCache
07-15 12:40:44.510 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.util.ImageWorker$CacheAsyncTask', referenced from method com.google.ytdl.util.ImageWorker.flushCache
07-15 12:40:44.510 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.util.ImageWorker$BitmapWorkerTask', referenced from method com.google.ytdl.util.ImageWorker.loadImage
07-15 12:40:44.518 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.util.ImageCache$RetainFragment', referenced from method com.google.ytdl.util.ImageCache.findOrCreateRetainFragment
07-15 12:40:44.542 3400-3400/com.google.ytdl E/dalvikvm﹕ Could not find class 'com.google.ytdl.util.RecyclingBitmapDrawable', referenced from method com.google.ytdl.util.ImageCache.addBitmapToCache
07-15 12:40:44.612 3400-3400/com.google.ytdl E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NoClassDefFoundError: com.google.ytdl.util.Utils
at com.google.ytdl.util.ImageCache.getExternalCacheDir(ImageCache.java:220)
at com.google.ytdl.util.ImageCache.getDiskCacheDir(ImageCache.java:144)
at com.google.ytdl.util.ImageFetcher.init(ImageFetcher.java:87)
at com.google.ytdl.util.ImageFetcher.(ImageFetcher.java:60)
at com.google.ytdl.MainActivity.ensureFetcher(MainActivity.java:232)
at com.google.ytdl.MainActivity.onGetImageFetcher(MainActivity.java:505)
at com.google.ytdl.UploadsListFragment.onAttach(UploadsListFragment.java:202)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:787)
at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1013)
at android.app.FragmentManagerImpl.addFragment(FragmentManager.java:1112)
at android.app.Activity.onCreateView(Activity.java:4814)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:680)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:306)
at android.app.Activity.setContentView(Activity.java:1912)
at com.google.ytdl.MainActivity.onCreate(MainActivity.java:115)
at android.app.Activity.performCreate(Activity.java:5163)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2061)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2122)
at android.app.ActivityThread.access$600(ActivityThread.java:140)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1228)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4895)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
at dalvik.system.NativeStart.main(Native Method)