[Koha] Koha installation

Dear Mr. Joshua Ferraro, Chris Cormack and Koha users, I just reinstalled koha 2.2.5 on Fedora core. The version of my Mysql is 5.0.22-fc5. The problem is still there. Some tables can't be created during the installation. So I can't open OPAC. I installed Koha windows version on another PC and then copy the database to my Fedora machine. This time, I can open opac-main.pl. I don't know If I can just use this database. Do I need to uninstall my Mysql service and install an old version of MySql? The other question is when I try to "add item type", the item I added doesn't show on the form of item type Admin. Thanks for any help. Jenny