Now it is O.K
Thank you !

Is there any suggestion ??

No the first one - no.
I don't remember the version.

Version of FireBoard JoomSEF is 2.0.1
before upgrade, everything was o.k.

by the way, new error :

Fatal error: Cannot use object of type fb_Config as array in /home/kontaktori/domains/kontaktorius.lt/public_html/components/com_sef/sef_ext/com_fireboard.php on line 18

Hello,

Now i using "Installed version: 1.0.5RC2" version of FireBoard

To which version do you offer to upgrade ?

Hello,

after upgrade to newest version of JoomSef when you disable JoomSef site works normally, when enable - you can see only the message :
Fatal error: Class 'sef_joomsef' not found in /home/kontaktori/domains/kontaktorius.lt/public_html/components/com_sef/sef_ext/com_fireboard.php on line 14

could you help me to solve this problem.

Thank you !