Upgrading 2.3.3 -> 2.5 – stuck in db-update

Hi,

i already updated some 2.3.x to 2.5 which worked well. Today i’m on a bit bigger installation and i’m stuck in wp-admin/upgrade.php – after updating the db it tells me it’s finished and i’m getting back to the message that i need ot update my database.

I can hit that 100 times which doesn’t change anything. I already rolled back to backup and completely restarted some times – i also reuploaded the files 2 times – nothing changes.

Any idea where i can get some ‘more saying’ error messages or something to find out where the problem exactly is and so probably find out why and fight it.

Thanks!