database error on simplemachine migration

Hi,i’ve just movec my old simplemachineforum installation from old website to this domain, including database import. I double checked all the paths, but when i try to view the forum, i recieve this message:

The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay
File: /home/vol14_2/
Riga: 70

can i have a hint how to solve this?