TAdoQuery - reconnect to SQL Server after LoadFromFile

I have TAdoQuery connected to SQL Server. Is it possible to "reconnect" to
server after loading from persisted recordset (LoadFromFile method)?
LoadFromFile implemented in TCustomADODataSet sets CommandType to "cmdFile".
Since this method is Protected it can't be changed in TAdoQuery to cmdText.
Are there any "simple" method to do that?

Wojciech