crystal report upgrade from 8.5 to 11

[gumirium]

I need to migrate reports from version 8.5 to 11. Open and save the reports in version 11 isn't enougth when i have some tables with outer joins. Reorder the tables links resolve my problem but i have to put all the table sequence in outer join, so the sql request is change. (table 1 (outer table 2 , table3)) become (table 1 outer (table 2 ,outer table 3). If anyome got this difficulties and resolve it, thank a lot to give the way. Or is there a guide to migrate reports ?
Thanks for your help.