I'm tried to import a csv file with some informations regarding a product with 1 attribute and 4 attribute value. I added even a column for the variant sell price but I wan't able to import that.. it update the product price and not each variant price with the related price.
Maybe I made something wrong?

Here the content of file csv:

id,name,type,categ_id,attribute_line_ids/attribute_id,attribute_line_ids/value_ids,product_variant_ids/default_code,product_variant_ids/lst_price,product_variant_ids/attribute_value_ids
70,Hosting,Service,All,,,WB001,12,1
,,,,,,WB002,13,2
,,,,,,WB003,14,3
,,,,Disk space GB,"1,2,3,4",,,