Thank you for the answers, even if they did not help me very much.
1. It is the 1.7.4 I try to install. I have uploaded the files, done all other changes as needed. Then I have to run the upgrade files, and when I try to run the upgrade file from 1.5 to 1.6 first I get the errors as descibed in the first post. My plan was then to run the 1.6 to 1.7.4 upgrade file.
2. I have looked trough the forum, help files and so on and can not find why I get the errors.
3. The site in question is
www.journeypix.com, if you go to it you will see that I, as far as I know, can not log in as admin.
Any help is greatly appreciated. Thank you very much for all help in advance.