Failed to load tracker data.

Hi everyone! i have a problem when i change imagetarget from StonesAndChips to config (created TMS) as follow JNIEXPORT int JNICALL Java_com_qualcomm_QCARSamples_ImageTargets_ImageTargets_loadTrackerData(JNIEnv *, jobject) { LOG("Java_com_qualcomm_QCARSamples_ImageTargets_ImageTargets_loadTrackerData"); // Get the image tracker: QCAR::TrackerManager& trackerManager = QCAR::TrackerManager::getInstance(); QCAR::ImageTracker* imageTracker = static_cast( trackerManager.getTracker(QCAR::Tracker::IMAGE_TRACKER)); if (imageTracker == NULL) { LOG("Failed to load tracking data set because the ImageTracker has not" " been initialized."); return 0; } // Create the data sets: dataSetStonesAndChips = imageTracker->createDataSet(); if (dataSetStonesAndChips == 0) { LOG("Failed to create a new tracking data."); return 0; } /* dataSetTarmac = imageTracker->createDataSet(); if (dataSetTarmac == 0) { LOG("Failed to create a new tracking data."); return 0; } */ // Load the data sets: if (!dataSetStonesAndChips->load("config.xml", QCAR::DataSet::STORAGE_APPRESOURCE)) { LOG("Failed to load data set."); return 0; } /* if (!dataSetTarmac->load("Tarmac.xml", QCAR::DataSet::STORAGE_APPRESOURCE)) { LOG("Failed to load data set."); return 0; } */ // Activate the data set: if (!imageTracker->activateDataSet(dataSetStonesAndChips)) { LOG("Failed to activate data set."); return 0; } LOG("Successfully loaded and activated data set."); return 1; } and ndk build is good but i build to .apk and run on x10i then show error "Failed to load tracker data" Please help me error. Thank so much!