Upload & Update not working...

I have tried several times to update records within a database tables with no success. Is it possible to update records?

Within Zoho Reports I select:

1) Import into Table.
2) How do you want to import? - Add records and replace if already exist
3) Select the column(s) to match existing records: Record ID#

Upload using CVS file

I'm trying to update roughly 15,000 records

And I'm getting a Timed Out error.......every time.

Is updating possible? If yes, is there a best method to use?

Thanks