xthreads error

[1master1]

got an error while trying to browse the restricted forums

Code:

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Site has experienced an internal SQL error and cannot continue. SQL Error: 1054 - Unknown column 'tfd.desc' in 'field list' Query: SELECT t.*, tfd.`desc` AS `xthreads_desc`, t.username AS threadusername, u.username, u.avatar FROM nstdb_threads t LEFT JOIN nstdb_users u ON (u.uid = t.uid) WHERE t.fid IN (148,149,163) AND t.tid IN (0,'345','324','256','108') AND t.visible='1' AND t.closed NOT LIKE 'moved|%' ORDER BY t.dateline DESC LIMIT 0, 10

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checked the phpmyadmin for the field list table. but didnt find any.