Builder C++ DBExpress clientdataset : insufficient memory for this operation

Question

i have a problem when i try to fill my DBGrid from datasource:

my code

void MyClass::initializeGridView()
{
    String sqlFilter = SrcQryStringList->Text + QueryStringList->Text;

    FilterSQLQuery->Close();
    FilterSQLQuery->SQL->Clear();
    FilterSQLQuery->SQL->Add(sqlFilter);
    FilterSQLQuery->Active = true;

    DocumentsDataSetProvider = new TDataSetProvider(this) ;
    DocumentsDataSetProvider->DataSet = FilterSQLQuery;
    DocumentsDataSetProvider->Name ="DocumentsDataSetProvider";

    DocumentsClientDataSet = new TClientDataSet(this);
    DocumentsClientDataSet->ProviderName = DocumentsDataSetProvider->Name ;
    DocumentsClientDataSet->Active = true; // "insufficient memory for this operation"


    DocumentsDataSource= new TDataSource (this);
    DocumentsDataSource->DataSet = DocumentsClientDataSet;

    JvDBGrid1->DataSource =  DocumentsDataSource;

    delete DocumentsDataSetProvider;
}

FilterSQLQuery is a TSQLQuery, JvDBGrid1 is a DBgrid

I get this error "insufficient memory for this operation" with high count of returned row!

Thx