Chess Diags implementation error

Chess Diags implementation error

We're trying to run the open source chess diags we have downloaded, it is
named as '64 cases'. We are currently having a problem with this Anyone
please help? The stacktrace is embedded below
08-06 23:31:19.568: I/ActivityThread(3519): Pub
com.estragon.chessdiags2.provider: com.estragon.sql.DiagContentProvider
08-06 23:31:19.576: W/dalvikvm(3519): Unable to resolve superclass of
Lcom/estragon/sql/DatabaseHelper; (608)
08-06 23:31:19.576: W/dalvikvm(3519): Link of class
'Lcom/estragon/sql/DatabaseHelper;' failed
08-06 23:31:19.576: E/dalvikvm(3519): Could not find class
'com.estragon.sql.DatabaseHelper', referenced from method
com.estragon.sql.DiagContentProvider.onCreate
08-06 23:31:19.576: W/dalvikvm(3519): VFY: unable to resolve
new-instance 602 (Lcom/estragon/sql/DatabaseHelper;) in
Lcom/estragon/sql/DiagContentProvider;
08-06 23:31:19.576: D/dalvikvm(3519): VFY: replacing opcode 0x22 at
0x0000
08-06 23:31:19.576: D/dalvikvm(3519): VFY: dead code 0x0002-000c in
Lcom/estragon/sql/DiagContentProvider;.onCreate ()Z
08-06 23:31:19.576: W/dalvikvm(3519): Unable to resolve superclass of
Lcom/estragon/sql/DatabaseHelper; (608)
08-06 23:31:19.576: W/dalvikvm(3519): Link of class
'Lcom/estragon/sql/DatabaseHelper;' failed
08-06 23:31:19.576: W/dalvikvm(3519): Unable to resolve superclass of
Lcom/estragon/sql/DatabaseHelper; (608)
08-06 23:31:19.576: W/dalvikvm(3519): Link of class
'Lcom/estragon/sql/DatabaseHelper;' failed
08-06 23:31:19.576: W/dalvikvm(3519): VFY: unable to resolve virtual
method 4872: Lcom/estragon/sql/DatabaseHelper;.getWritableDatabase
()Landroid/database/sqlite/SQLiteDatabase;
08-06 23:31:19.576: D/dalvikvm(3519): VFY: replacing opcode 0x6e at
0x0011
08-06 23:31:19.584: W/dalvikvm(3519): Unable to resolve superclass of
Lcom/estragon/sql/DatabaseHelper; (608)
08-06 23:31:19.584: W/dalvikvm(3519): Link of class
'Lcom/estragon/sql/DatabaseHelper;' failed
08-06 23:31:19.584: D/dalvikvm(3519): VFY: dead code 0x0014-0029 in
Lcom/estragon/sql/DiagContentProvider;.query
(Landroid/net/Uri;[Ljava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)Landroid/database/Cursor;
08-06 23:31:19.584: W/dalvikvm(3519): Unable to resolve superclass of
Lcom/estragon/sql/DatabaseHelper; (608)
08-06 23:31:19.584: W/dalvikvm(3519): Link of class
'Lcom/estragon/sql/DatabaseHelper;' failed
08-06 23:31:19.592: W/dalvikvm(3519): Unable to resolve superclass of
Lcom/estragon/sql/DatabaseHelper; (608)
08-06 23:31:19.592: W/dalvikvm(3519): Link of class
'Lcom/estragon/sql/DatabaseHelper;' failed
08-06 23:31:19.592: W/dalvikvm(3519): VFY: unable to resolve virtual
method 4872: Lcom/estragon/sql/DatabaseHelper;.getWritableDatabase
()Landroid/database/sqlite/SQLiteDatabase;
08-06 23:31:19.592: D/dalvikvm(3519): VFY: replacing opcode 0x6e at
0x0012
08-06 23:31:19.592: W/dalvikvm(3519): Unable to resolve superclass of
Lcom/estragon/sql/DatabaseHelper; (608)
08-06 23:31:19.592: W/dalvikvm(3519): Link of class
'Lcom/estragon/sql/DatabaseHelper;' failed
08-06 23:31:19.592: D/dalvikvm(3519): VFY: dead code 0x0015-003c in
Lcom/estragon/sql/DiagContentProvider;.update
(Landroid/net/Uri;Landroid/content/ContentValues;Ljava/lang/String;[Ljava/lang/String;)I
08-06 23:31:19.592: D/AndroidRuntime(3519): Shutting down VM
08-06 23:31:19.592: W/dalvikvm(3519): threadid=1: thread exiting with
uncaught exception (group=0x40018578)
08-06 23:31:19.599: E/AndroidRuntime(3519): FATAL EXCEPTION: main
08-06 23:31:19.599: E/AndroidRuntime(3519):
java.lang.NoClassDefFoundError: com.estragon.sql.DatabaseHelper
08-06 23:31:19.599: E/AndroidRuntime(3519): at
com.estragon.sql.DiagContentProvider.onCreate(DiagContentProvider.java:47)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
android.content.ContentProvider.attachInfo(ContentProvider.java:840)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
android.app.ActivityThread.installProvider(ActivityThread.java:3558)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
android.app.ActivityThread.installContentProviders(ActivityThread.java:3313)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
android.app.ActivityThread.handleBindApplication(ActivityThread.java:3269)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
android.app.ActivityThread.access$2200(ActivityThread.java:117)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:973)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
android.os.Handler.dispatchMessage(Handler.java:99)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
android.os.Looper.loop(Looper.java:130)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
android.app.ActivityThread.main(ActivityThread.java:3687)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
java.lang.reflect.Method.invokeNative(Native Method)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
java.lang.reflect.Method.invoke(Method.java:507)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
08-06 23:31:19.599: E/AndroidRuntime(3519): at
dalvik.system.NativeStart.main(Native Method)