I restored to 7.4.2 and all is fine, all user can login and website is succefully. I upgrade again to 8.0 Recomendated Release and I see that when is upgrade have a only one error but another is succefully...

00:00:03.350 -   Executing Script:08.00.00.29.SqlDataProvider Error! (see 08.00.00.29.log.resources for more information)

this is the content of this file...

System.Data.SqlClient.SqlException (0x80131904): La conversión del tipo de datos varchar en datetime produjo un valor fuera de intervalo.

Se terminó la instrucción.

   at System.Data.SqlClient.SqlConnection. (SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)

   at System.Data.SqlClient.SqlInternalConnection. (SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)

   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)

   at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)

   at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite)

   at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite)

   at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()

   at DotNetNuke.Data.SqlDataProvider.ExecuteScriptInternal(String connectionString, String script)

ClientConnectionId:94740bc6-9cfe-4202-893a-160ba2447188

Error Number:242,State:3,Class:16

-- DNN-8141 END

-- CONTENT-5617 Page Settings Error: 12/31/9999 11:59:59 PM' is not valid for 'SelectedDate'

IF OBJECT_ID(N'dbo.[Tabs]', N'U') IS NOT NULL

UPDATE dbo.[Tabs]

SET EndDate = NULL

WHERE EndDate >= '9999-12-31'

Maybe this is the problem for no can login like a superuser (host)... because again have a problem with login like a "host", only when i want to login like a host, another user can login succefully...

And this do my error in my website when I try to login like a host?

Can I to downground my dnn 8.0 to 7.4.2 and edit this file and change it and update again to 8.0 for fix this problem? and when i do this, would be fixed my problem with login (host) ?