I just upgraded my dnn system.  I was hoping to get to version 4.3.6.  I used the install version.  I have a production system running on the server with SQL Server.  I merged the changes to web.config, uploaded all the files (telling the ftp client to overwrite all).  I then proceeded to the install.aspx and the script ran successfully with three errors: 

(seed:\hosting\bnsccom\cms\Providers\DataProviders\SqlDataProvider\03.02.03.log for more information)
(seed:\hosting\bnsccom\cms\Providers\DataProviders\SqlDataProvider\03.03.01.log for more information)
(seed:\hosting\bnsccom\cms\Providers\DataProviders\SqlDataProvider\04.03.01.log for more information)

I reviewed the errors and they seem to be problems with a foreign key in a table for folders.  I was hoping maybe the error shows up because this foreign key already exists...not sure about that, but it seemed logical.

I then proceeded to attempt to run the site.  Of course the first time it is run there is the compile overhead....it timed out.  I don't seem to have access to the server to adjust the timeout...I may be wrong about the compile thing, this may be due to something else. 

The error that shows up is as follows:

url as seen in browser: 

http://www.bnsc.com/cms/Default.aspx?tabid=36&error=Data+at+the+root+level+is+invalid.+Line+52%2c+position+16.&content=0

Content of web page:

An error has occurred.
An error has occurred.

I did try the other portals, most fail the same as this, but some do try to load.  The ones that do load, do not load enough to be able to log in.  I get a failure to load the login module.

If anyone out there in dotnetnuke land has any ideas, I would really like to hear about it.  I have tried looking in the forums for this problem and have not suceeded...the search feature is not robust enough and google does not give me returns for the exact error.

The only other piece of info i can offer right now is that the original version was something like 3.2.3...though my memory may be failing...the version was an older version.   

Thank you for any assistance.