Issue on Database

Can someone tell me where is this problem coming from?
Below the error_log

[04-Nov-2010 01:48:03] WordPress database error MySQL server has gone away for query SELECT option_value FROM wp_options WHERE option_name = ‘IWG_RoleMan_Spaces_in_Caps’ LIMIT 1 made by require, require_once, require_once, require_once, include_once, IWG_RoleManagement->IWG_RoleManagement, get_option

…[and other messages of the same type]]

[04-Nov-2010 01:48:03] WordPress database error MySQL server has gone away for query SELECT t.*, tt.* FROM wp_terms AS t INNER JOIN wp_term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN (‘link_category’) AND tt.count > 0 ORDER BY t.name ASC made by require, require_once, include, include, wp_list_bookmarks, get_terms

…

Please help!