> The strange fact is that when I tried to continue the 
> interrupted download,the engine looked like it was 
> downloading correctly but in the end nothing was 
> downloaded!!!!!

The 'continue' feature will attempt NOT to download 
anything, and will (should) :
- regenerate html files
- check if data files still exists ; if not, will 
redownload them, except if "do not redownload locally 
erased files" was activated

Were all files being checked?