create a copy of main site that was presta 1.2.5 version, and also copying the database. and when upgrade the copysite from 1.2.5 to 1.4.5 on mydomain.com/newsite ... the main site become Invalid loadTaxZones() SQL query!
Solution
The problem is the database upgrade from 1.4 removes the table named "tax_zone".
So, You have to import the "tax_zone" from your backed up database, and it fixed the problem.