Help me about upgrade vb2.x to vb3Gamma

After i run database_conflicts.php and step 1 upgrade (domain.com/forum/install/upgrade.php) there have a error appear. please help me ?

There seems to have been a slight problem with the database.
Please try again by pressing the refresh button in your browser.

An E-Mail has been dispatched to our Technical Staff, who you can also contact if the problem persists.

We apologise for any inconvenience

Do i can fix : $tableprefix = ''; ? please explain for me know.

thank

[deathemperor]

I see you are from the country I live, mate , contact me if you like via YM: deathemperor1st
I think the clue you was giving wasn't enough for everyone to slove this to you, the more things you provide, the clearer your problem shows