Ayuda Urgente!

[rcarcamonster]

Hola ayer comenzó a salir una error en mi sitio web en el header. No se que puede ser. Restablecí la copia de seguridad y sigue con el error. Me temo que puede haber sido un hackeo debido a que me llegó un mail con un informe del error diciéndome que el hosting que tengo es malo y que contrate el de ellos.
El error es este:

DB function failed with error number 145
Table './dsvillar_rcarcamonster/jos_bb2_log' is marked as crashed and should be repaired SQL=INSERT INTO `jos_bb2_log` (`ip`, `date`, `request_method`, `request_uri`, `server_protocol`, `http_headers`, `user_agent`, `request_entity`, `key`) VALUES ('190.82.143.153', '2008-11-16 13:26:37', 'GET', '/index.php', 'HTTP/1.1', 'GET /index.php HTTP/1.1 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\nAccept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7\nAccept-Encoding: gzip,deflate\nAccept-Language: es-es,es;q=0.8,en-us;q=0.5,en;q=0.3\nConnection: keep-alive\nCookie: __utma=41051937.854425395.1225493129.1226774702.12 26806134.39; __utmz=41051937.1226358117.22.4.utmccn=(referral)| utmcsr=rcarcamonster.com|utmcct=/|utmcmd=referral; JATheme=ja_mercury; a8ceb24a314ca99d706f5564fe49b354=83e6ced279d5b1ea7 b80406fd2b5d253\nHost: www.rcarcamonster.com\nKeep-Alive: 300\nReferer: http://www.rcarcamonster.com/adminis...p\nUser-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; es-ES; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4\n', 'Mozilla/5.0 (Windows; U; Windows NT 5.1; es-ES; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4', '', '00000000')
Warning: Cannot modify header information - headers already sent by (output started at /home/dsvillar/public_html/rcarcamonster/mambots/system/bad-behavior/bad-behavior-joomla.php:90) in /home/dsvillar/public_html/rcarcamonster/includes/joomla.php on line 1463

Warning: Cannot modify header information - headers already sent by (output started at /home/dsvillar/public_html/rcarcamonster/mambots/system/bad-behavior/bad-behavior-joomla.php:90) in /home/dsvillar/public_html/rcarcamonster/index.php on line 251

Warning: Cannot modify header information - headers already sent by (output started at /home/dsvillar/public_html/rcarcamonster/mambots/system/bad-behavior/bad-behavior-joomla.php:90) in /home/dsvillar/public_html/rcarcamonster/index.php on line 252

Warning: Cannot modify header information - headers already sent by (output started at /home/dsvillar/public_html/rcarcamonster/mambots/system/bad-behavior/bad-behavior-joomla.php:90) in /home/dsvillar/public_html/rcarcamonster/index.php on line 253

Warning: Cannot modify header information - headers already sent by (output started at /home/dsvillar/public_html/rcarcamonster/mambots/system/bad-behavior/bad-behavior-joomla.php:90) in /home/dsvillar/public_html/rcarcamonster/index.php on line 254

Warning: Cannot modify header information - headers already sent by (output started at /home/dsvillar/public_html/rcarcamonster/mambots/system/bad-behavior/bad-behavior-joomla.php:90) in /home/dsvillar/public_html/rcarcamonster/index.php on line 255

Les ruego me ayuden porque tengo mi sitio web fuera de línea.
Por sierto el sitio es www.Rcarcamonster.com

Muchas Gracias y espero sus respuestas.