Database error on Variation

Hello. I am presented with an error of E-commerce. when I add a variation and then updating the Product.

WordPress database error: [Table ‘xxx_wpress.xxx_wpsc_product_categories’ doesn’t exist]
SELECT id FROM xxx_wpsc_product_categories WHERE active = 1

WordPress database error: [Table ‘xxx_wpress.xxx_wpsc_product_list’ doesn’t exist]
SELECT id, date_added FROM xxx_wpsc_product_list WHERE active = 1 AND publish = 1

What should I do?

i re-installed the plugins several times

Thanks for the help

Sorry for my english