diff --git a/catalogmodel.cpp b/catalogmodel.cpp
index cd8cd51..60942aa 100644
--- a/catalogmodel.cpp
+++ b/catalogmodel.cpp
@@ -45,9 +45,9 @@ void CCatalogModel::onLanguageChanged()
 
 void CCatalogModel::setModelData (CCatalog *pCatalog)
 {
-	reset();
+	beginResetModel();
 	m_pCatalog = pCatalog;
-	reset();
+	endResetModel();
 }
 
 int CCatalogModel::columnCount (const QModelIndex& parent) const
diff --git a/chaptermodel.cpp b/chaptermodel.cpp
index 31b1673..b1f8150 100644
--- a/chaptermodel.cpp
+++ b/chaptermodel.cpp
@@ -45,16 +45,18 @@ void CChapterModel::onLanguageChanged()
 
 void CChapterModel::clear()
 {
+	beginResetModel();
 	m_listChapter.clear();
 	m_pCatalog = 0;
-	reset();
+	endResetModel();
 }
 
 void CChapterModel::setModelData (CCatalog *pCatalog, QList<CChapter*> listChapter)
 {
+	beginResetModel();
 	m_listChapter = listChapter;
 	m_pCatalog = pCatalog;
-	reset();
+	endResetModel();
 }
 
 int CChapterModel::columnCount (const QModelIndex & parent) const
diff --git a/questionmodel.cpp b/questionmodel.cpp
index 23417ec..b049e38 100644
--- a/questionmodel.cpp
+++ b/questionmodel.cpp
@@ -40,14 +40,16 @@ void CQuestionModel::onLanguageChanged()
 
 void CQuestionModel::clear()
 {
+	beginResetModel();
 	m_pChapter=0;
-	reset();
+	endResetModel();
 }
 
 void CQuestionModel::setModelData (CChapter *pChapter)
 {
+	beginResetModel();
 	m_pChapter = pChapter;
-	reset();
+	endResetModel();
 }
 
 int CQuestionModel::columnCount (const QModelIndex & parent) const