unfortunately,com.sinch.apptoappcall has stopped Android

when i run the program gives me the error message "unfortunately,com.sinch.apptoappcall has stopped"

LogCat 

11-16 19:35:10.610: D/AndroidRuntime(897): Shutting down VM
11-16 19:35:10.610: W/dalvikvm(897): threadid=1: thread exiting with uncaught exception (group=0xb1acbba8)
11-16 19:35:10.650: E/AndroidRuntime(897): FATAL EXCEPTION: main
11-16 19:35:10.650: E/AndroidRuntime(897): Process: com.sinch.apptoappcall, PID: 897
11-16 19:35:10.650: E/AndroidRuntime(897): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.sinch.apptoappcall/com.sinch.apptoappcall.LoginActivity}: java.lang.ClassNotFoundException: Didn't find class "com.sinch.apptoappcall.LoginActivity" on path: DexPathList[[zip file "/data/app/com.sinch.apptoappcall-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.sinch.apptoappcall-1, /system/lib]]
11-16 19:35:10.650: E/AndroidRuntime(897):      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2121)
11-16 19:35:10.650: E/AndroidRuntime(897):      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
11-16 19:35:10.650: E/AndroidRuntime(897):      at android.app.ActivityThread.access$800(ActivityThread.java:135)
11-16 19:35:10.650: E/AndroidRuntime(897):      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
11-16 19:35:10.650: E/AndroidRuntime(897):      at android.os.Handler.dispatchMessage(Handler.java:102)
11-16 19:35:10.650: E/AndroidRuntime(897):      at android.os.Looper.loop(Looper.java:136)
11-16 19:35:10.650: E/AndroidRuntime(897):      at android.app.ActivityThread.main(ActivityThread.java:5017)
11-16 19:35:10.650: E/AndroidRuntime(897):      at java.lang.reflect.Method.invokeNative(Native Method)
11-16 19:35:10.650: E/AndroidRuntime(897):      at java.lang.reflect.Method.invoke(Method.java:515)
11-16 19:35:10.650: E/AndroidRuntime(897):      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
11-16 19:35:10.650: E/AndroidRuntime(897):      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
11-16 19:35:10.650: E/AndroidRuntime(897):      at dalvik.system.NativeStart.main(Native Method)
11-16 19:35:10.650: E/AndroidRuntime(897): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.sinch.apptoappcall.LoginActivity" on path: DexPathList[[zip file "/data/app/com.sinch.apptoappcall-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.sinch.apptoappcall-1, /system/lib]]
11-16 19:35:10.650: E/AndroidRuntime(897):      at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
11-16 19:35:10.650: E/AndroidRuntime(897):      at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
11-16 19:35:10.650: E/AndroidRuntime(897):      at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
11-16 19:35:10.650: E/AndroidRuntime(897):      at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
11-16 19:35:10.650: E/AndroidRuntime(897):      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2112)
11-16 19:35:10.650: E/AndroidRuntime(897):      ... 11 more

i uploaded the program here http://ift.tt/1uvqvxI , im using eclipse ,windows7