The update process went fine.

Now i get the following error on the production site:

[NullReferenceException: Object reference not set to an instance of an object.]
   DotNetNuke.Framework.Reflection.CreateObject(String ObjectProviderType, String ObjectProviderName, String ObjectNamespace, String ObjectAssemblyName, Boolean UseCache) +465
   DotNetNuke.Security.Membership.MembershipProvider.CreateProvider() +38
   DotNetNuke.Security.Membership.MembershipProvider..cctor() +13

[TypeInitializationException: The type initializer for 'DotNetNuke.Security.Membership.MembershipProvider' threw an exception.]
   DotNetNuke.Security.Membership.MembershipProvider.Instance() +0
   DotNetNuke.Entities.Users.UserController..cctor() +5

[TypeInitializationException: The type initializer for 'DotNetNuke.Entities.Users.UserController' threw an exception.]
   DotNetNuke.Entities.Users.UserController.GetCurrentUserInfo() +0
   DotNetNuke.Services.Exceptions.BasePortalException.InitilizePrivateVariables() +245

I'm desperate - please help!

Thanks Leupold for your readiness,

1- I had the 2 following errors:

System.Data.SqlClient.SqlException: ALTER TABLE statement conflicted with COLUMN FOREIGN KEY constraint 'FK_Files_Folders'. The conflict occurred in database 'APINFOR', table 'Folders', column 'FolderID'.

But i fixed them by updating rows in the files table with wrong folder Id's.

Then the script run successfully.

2 - What's server side compression? If it's on, i think it's too late now...

3 - User data seems Ok in both tables

When viewing the site anonymously.

After typing www.apinfor.com in the browser's address - be wellcome to try it yourseft.

Users can't even try to login...