The mistakes are probably due to the fact that you are running a
beta version of 3.0. Unfortunately, you cannot upgrade from Sitefinity
3.0 Beta directly to 3.1. The database is upgraded automatically so in
order to upgrade it you
need to create projects that are respectively created by a Sitefinity
version 3.0, 3.0 SP2 and then 3.1.
In order to make a project in 3.0 official release, you need to change the assemblies (found in the bin folder)
and the Sitefinity folder content. You can get these by downloading the
version from your client.net account on Sitefinity's site. After running the project, you
need to follow the same procedure again for upgrading to 3.0 SP2.
Actually, after applying version 3.0 you could use the hotfix for the Service pack 2. You need to unzip each package, open the Sitefinity
folders from the Empty project and copy their files into your project
and start your site. Do it for both versions. Before starting upgrading
your project, please back it up.
After doing the above steps you could start upgrading your project to version 3.1 using the instructions in the manual.
Sorry for the inconvenience.
All the best,
the Telerik team