Upgrading to 12x error

[Juan Aristizabal]

When I try to upgrade to the new plesk (Odin) I get the following error.
FATAL_ERROR: [MYSQL ERROR] Unable to execute query. Error: No database selected

And the log shows this:

INFO: Installed Plesk version/build: 11.5.30 Windows 2008/2012 20130808.09...

INFO: STEP 0: Detect system configuration...
INFO: OS: Windows
INFO: Arch: x86_64

INFO: Validating the database password...
INFO: Result: OK

INFO: Pre-Upgrade analyzer version: 12.5.30.0...
INFO: STEP 1: Validate hostname...
INFO: Result: OK

INFO: STEP 2: Checking if the MySQL engine InnoDB is allowed...
INFO: Result: OK

INFO: STEP 3: Checking the compatibility of the installed PHP version with the webmail software...
INFO: Result: OK

INFO: STEP 4: Detecting if encrypted passwords are used...
Error:
FATAL_ERROR: [MYSQL ERROR] Unable to execute query. Error: No database selected


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I don't know what could it be. Any help would be appreciated!