Transfer records/content from Mighty Resources 1.5.9 Build 8087 to Cobalt 8

Hello everybody. Im prety advanced joomla developer and i have the following problem:

I have a client that stil uses joomla 1.5 and mighty resources extension for his website and he wants me to urgrade/migrate to the latest versions. Her website is http://www.languagetree.org/ I did the following tasks: I did the migration manualy in my localhost, meaning that i did a fresh installation to my localhost with joomla 3 and cobalt8 extension and the fields that it needs to work as it should. I lastly installed cobalt 8. Then, i deleted the empty tables of cobalt and uploaded all the previous tables of mighty resources to my localhost/phpmyadmin. I created the cobalt fields manually from my joomla3/administrator area. I uploaded the tables of Mighty Resources to cobalt tables in my localhost/phpmyadmin. All went good until i uploaded record/record_category/record_values tables and i get the following error in two different cobalt sections:

Records cobalt section: Error Unknown column 'a.section_id' in 'on clause' SQL=SELECT COUNT() FROM jos_js_res_record AS a LEFT JOIN jos_js_res_types AS t ON a.type_id = t.id LEFT JOIN jos_js_res_sections AS s ON a.section_id = s.id LEFT JOIN jos_users AS u ON a.user_id = u.id LEFT JOIN jos_viewlevels AS vl ON a.access = vl.id WHERE (a.published IN (0, 1)) Unknown column 'a.section_id' in 'on clause' SQL=SELECT a.,t.name AS type_name,s.name AS section_name,CONCAT(u.username," (",u.name,")") AS username,vl.title AS access_title FROM jos_js_res_record AS a LEFT JOIN jos_js_res_types AS t ON a.type_id = t.id LEFT JOIN jos_js_res_sections AS s ON a.section_id = s.id LEFT JOIN jos_users AS u ON a.user_id = u.id LEFT JOIN jos_viewlevels AS vl ON a.access = vl.id WHERE (a.published IN (0, 1)) ORDER BY a.ctime asc Unknown column 'a.section_id' in 'on clause' SQL=SELECT COUNT(*) FROM jos_js_res_record AS a LEFT JOIN jos_js_res_types AS t ON a.type_id = t.id LEFT JOIN jos_js_res_sections AS s ON a.section_id = s.id LEFT JOIN jos_users AS u ON a.user_id = u.id LEFT JOIN jos_viewlevels AS vl ON a.access = vl.id WHERE (a.published IN (0, 1))

Sections cobalt section: Error Unknown column 'section_id' in 'where clause' SQL=SELECT a.,(SELECT COUNT() FROM jos_js_res_categories WHERE section_id = a.id) as fieldnum,(SELECT COUNT() FROM jos_js_res_record WHERE section_id = a.id) as records FROM jos_js_res_sections AS a WHERE (a.published IN (0, 1)) GROUP BY a.id ORDER BY a.name asc Unknown column 'section_id' in 'where clause' SQL=SELECT a.,(SELECT COUNT() FROM jos_js_res_categories WHERE section_id = a.id) as fieldnum,(SELECT COUNT() FROM jos_js_res_record WHERE section_id = a.id) as records FROM jos_js_res_sections AS a WHERE (a.published IN (0, 1)) GROUP BY a.id ORDER BY a.name asc Unknown column 'section_id' in 'where clause' SQL=SELECT a.,(SELECT COUNT() FROM jos_js_res_categories WHERE section_id = a.id) as fieldnum,(SELECT COUNT(*) FROM jos_js_res_record WHERE section_id = a.id) as records FROM jos_js_res_sections AS a WHERE (a.published IN (0, 1)) GROUP BY a.id ORDER BY a.name asc

These errors mean that some content dont correspond to categories or something else? How can i solve these errors?