MySQL upgrade

MySQL upgrade

Good day!
We are using SD v9004 but MySQL version is very old - 4.1.18. Is it possible to upgrade MySQL to latest supported version (as i know it is 5.1.50) and what are the right steps?
We have tried to uninstall our current version and install v.8121 (its the last version which supports MySQL installation and use MySQL 5.1.50). And after that we have installed all neccessary service packs to upgrade to 9004. After that we have used our backup for information restoring.
All seems fine - SD have started, but something is wrong. In log file there is an error "Column count of mysql.db is wrong" and i think this is not the only one error. So do you have any instruction for db upgrading?



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