Sql dont execute database

I using mysql 5.1+navicate2007or mysql+sqlyog and have problem with some sql if i exucute some database i have problem

Query:
CREATE TABLE `areatrigger_involvedrelation` (
`id` int(11) unsigned NOT NULL default '0' COMMENT 'Identifier',
`quest` int(11) unsigned NOT NULL default '0' COMMENT 'Quest Identifier',
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 ROW_FORMAT=FIXED COMMENT='Trigger System'
Error occured at:2007-05-04 11:31:43
Line no.:21
Error Code: 1050 - Table 'areatrigger_involvedrelation' already exists
....
Error occured at:2007-05-04 11:35:29
Line no.:478
Error Code: 2006 - MySQL server has gone away
Some data working correctly but some have this problem i change all sql version,navicate,sqlyog removing all database from computer unnistalling all program restarting...
database: SDB_0.6.4FULL+REV_176+FIXES+PATCHES.rar
core: Mangos 3580+ScriptDev2rev.40+Patches+vmapextractor-assembler
Program execute but stopped.

any suggestion with using program or patch any???