thanks for your assistance.
When I tried to install PS3, i faced problem at the database installation part. 2.php.
ERROR: The twinsas1_twinsasia database is not empty, it already contains tables named ps3_categories, ps3_contenthistory, ps3_contents, ps3_couponproducts, ps3_coupons, ps3_optiongroups, ps3_options, ps3_orderdetails, ps3_orders, ps3_productcategories, ps3_productoptions, ps3_products. Please create an empty database for PowerStore to use.
I need to use previous database (backup), and not creating a new database.
What should I do.