First you are talking two different animals.
Upgrading from a 6.5 database to 7.x is different than upgrading within the 7.x series. You will need to use a importer from the members area.
If you already ran the upgrade script with the proper existing version then it maybe you either uploaded more than you should have or you missed a few folder/files in the process.
Running upgrade again will not help but uploading all the correct files may.
