Upgrade 3.5 to 3.6 Fail

I am testing out the upgrade form 3.5 to 3.6 before I do it on production and I can't get it to work.  I have been followign the steps exactly as in the email.  I am backing up the filevista.mdb and filevista.config files, overlaying the contrents of the zipped up fileVista folder onto my iis app folder.  I then copy the two files back to their respective location.  I run update.aspx and I get the following message:

"System.Data.OleDb.OleDbException: Column names in each table must be unique.  Column name 'SubFolder' in table 'PermisisonEntry' is specified more than once.

I am using SQL Server... it has been working fine.  I have two production installations.  I sure don't want to try upgrading those until I can get it to work in test.  I have tried blowing away the directory and database and isntalling a new 3.5 and then doing the update again... same thing.

Any suggestions would be great

So no one has had this issue when upgrading from 3.5 to 3.6?  

Hi Leon,
Sorry for the inconvenience, we sent a second notification email regarding the users of v3.5 but I guess you didn't receive it.
When upgrading from v3.5, do not run update.aspx as it's not required.