sqli problem
 

how do i safe my forum with sqli?

Do you mean back up?

If so go into Phpmyadmin and export to a file and you will get an sql copy to your pc.

Or you can use putty if you have root access. Do you? If so use this

mysqldump -u username -p database_name > /yourpath/dbname.sql and put the path to where you want the file to be placed. Then download it if you want.

From the manual:
Backing Up The Database via SSH/Telnet or
Backing Up The Database via phpMyAdmin

Restoring The Database via SSH/Telnet or
Restoring The Database via phpMyAdmin

If you don't have shell access, some people have also reported success with these scripts:
MySQLDumper
MySQLHotxcopy
Bigdump