Database error when trying to perform a search

HI,

I'm receiving the following errors when I try to perform a content search:

‚Access denied for user 'w****' to database 'wa5303_db1' query: CREATE TEMPORARY TABLE temp_search_sids SELECT i.type, i.sid, SUM(i.score * t.count) AS relevance, COUNT(*) AS matches FROM search_index i INNER JOIN search_total t ON i.word = t.word INNER JOIN node n ON n.nid = i.sid INNER JOIN users u ON n.uid = u.uid WHERE n.status = 1 AND (i.word = 'abend') AND i.type = 'node' GROUP BY i.type, i.sid HAVING COUNT(*) >= 1‘ in ‚/****/australien-community/includes/database.mysql.inc‘ in Zeile 120.

AND

Table 'wa5303_db1.temp_search_sids' doesn't exist query: SELECT MAX(relevance) FROM temp_search_sids‘ in ‚/home/****/includes/database.mysql.inc‘ in Zeile 120.

Does anyone know what I need to do to get rid of this error so I'm able to use the search function?

THX!

kai