MySQL errornumber 145

Hi,

after altering a page in the wiki I get the following error:

Es gab einen Syntaxfehler in der Datenbankabfrage. Die letzte Datenbankabfrage lautete:

    (SQL-Abfrage versteckt)

aus der Funktion „SearchMySQL4::update“. MySQL meldete den Fehler „145: Table '.\mediawiki\searchindex' is marked as crashed and should be repaired (localhost)“.

Inspite this message the alternations where saved. But I can't search for the altered pages anymore. Allways get the message above.

Who knows how to repair the searchindex?

Thank you in advance

Ingo