[computer1]

I get this error when I reinstall helpdesk howe can I fix this ??

Database error in vBulletin 3.0.7:

Invalid SQL: CREATE TABLE `ticketreply` (
`replyid` int(10) unsigned NOT NULL auto_increment,
`ticketid` int(10) unsigned NOT NULL default '0',
`username` varchar(50) NOT NULL default '',
`userid` int(10) unsigned NOT NULL default '0',
`dateline` int(10) unsigned NOT NULL default '0',
`pagetext` mediumtext NOT NULL,
`ipaddress` varchar(15) NOT NULL default '',
PRIMARY KEY (`replyid`),
KEY `userid` (`userid`),
KEY `threadid` (`ticketid`,`userid`)
) TYPE=MyISAM AUTO_INCREMENT=1
mysql error: Table 'ticketreply' already exists

mysql error number: 1050