Problem with migrate products from OC 1.5.2.1 to 1.5.6.4

Hello,
I have a problem when export products from OC 1.5.2.1 and try to import them into OC 1.5.6.4.
The error is : Export/Import: Invalid header in the Products worksheet
Export/Import: Invalid header in the ProductOptionValues worksheet

Can you help me with this please?

I use extension : opencart-1-5-1-to-1-5-6-x-export-import-multilingual-2-19

I have success with importing products, but when i open frontend category with products i have this errors :

Warning: mysqli::query() [mysqli.query]: (21000/1242): Subquery returns more than 1 row in /home/xxx/public_html/new/system/database/mysqli.php on line 17
Fatal error: Uncaught exception 'ErrorException' with message 'Error: Subquery returns more than 1 row<br />Error No: 1242<br />SELECT DISTINCT *, pd.name AS name, p.image, m.name AS manufacturer, (SELECT price FROM oc6684_product_discount pd2 WHERE pd2.product_id = p.product_id AND pd2.customer_group_id = '1' AND pd2.quantity = '1' AND ((pd2.date_start = '0000-00-00' OR pd2.date_start < NOW()) AND (pd2.date_end = '0000-00-00' OR pd2.date_end > NOW())) ORDER BY pd2.priority ASC, pd2.price ASC LIMIT 1) AS discount, (SELECT price FROM oc6684_product_special ps WHERE ps.product_id = p.product_id AND ps.customer_group_id = '1' AND ((ps.date_start = '0000-00-00' OR ps.date_start < NOW()) AND (ps.date_end = '0000-00-00' OR ps.date_end > NOW())) ORDER BY ps.priority ASC, ps.price ASC LIMIT 1) AS special, (SELECT points FROM oc6684_product_reward pr WHERE pr.product_id = p.product_id AND customer_group_id = '1') AS reward, (SELECT ss.name FROM oc6684_stock_status ss WHERE ss.stock_status_id = p.stock_status_id AND ss.language_id in /home/xxx/public_html/new/system/database/mysqli.php on line 41

Can you help me?

icedge wrote:I use extension : opencart-1-5-1-to-1-5-6-x-export-import-multilingual-2-19

Please use the extension topic: http://forum.opencart.com/viewtopic.php?f=119&t=130772

tjsystems wrote:

icedge wrote:I use extension : opencart-1-5-1-to-1-5-6-x-export-import-multilingual-2-19

Please use the extension topic: http://forum.opencart.com/viewtopic.php?f=119&t=130772

Hello, this is the same extension..