Problem sortin TableView

[mourad]

Hello everyone,
I'm tring to sort my data filled in a QTableView. Data are the result of a query.
For that, I've proceed like below :

QSqlQueryModel *modelAb = new QSqlQueryModel(this);
modelAb ->setQuery(query, dbConnexion);
while(modelAb->canFetchMore())
modelAb->fetchMore();

QSortFilterProxyModel * mSortFilterModel = new QSortFilterProxyModel(this);
mSortFilterModel->setDynamicSortFilter(true);
mSortFilterModel->setSourceModel(modelAb);
tabAbonne->setModel(mSortFilterModel);
tabAbonne->setSortingEnabled(true);
My problem is that for some columns, sorting works fine but for the other is not working.
Can anyone help me to resolve this problem.
Best regards.