利用作业备份数据库问题

利用作业备份数据库问题？

-- 2005-11-4/22:24 上生成的脚本
-- 由: sa
-- 服务器: (LOCAL)

BEGIN TRANSACTION
DECLARE @JobID BINARY(16)
DECLARE @ReturnCode INT
SELECT @ReturnCode = 0
IF (SELECT COUNT(*) FROM msdb.dbo.syscategories WHERE name = N'Database Maintenance') < 1
EXECUTE msdb.dbo.sp_add_category @name = N'Database Maintenance'

-- 删除同名的警报（如果有的话）。
SELECT @JobID = job_id
FROM msdb.dbo.sysjobs
WHERE (name = N'备份作业2')
IF (@JobID IS NOT NULL)
BEGIN
-- 检查此作业是否为多重服务器作业
IF (EXISTS (SELECT *
FROM msdb.dbo.sysjobservers
WHERE (job_id = @JobID) AND (server_id <> 0)))
BEGIN
-- 已经存在，因而终止脚本
RAISERROR (N'无法导入作业“备份作业2”，因为已经有相同名称的多重服务器作业。', 16, 1)
GOTO QuitWithRollback
END
ELSE
-- 删除［本地］作业
EXECUTE msdb.dbo.sp_delete_job @job_name = N'备份作业2'
SELECT @JobID = NULL
END

BEGIN

-- 添加作业
EXECUTE @ReturnCode = msdb.dbo.sp_add_job @job_id = @JobID OUTPUT , @job_name = N'备份作业2', @owner_login_name = N'sa', @description = N'完全备份', @category_name = N'Database Maintenance', @enabled = 1, @notify_level_email = 0, @notify_level_page = 0, @notify_level_netsend = 0, @notify_level_eventlog = 2, @delete_level= 0
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

-- 添加作业步骤
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobstep @job_id = @JobID, @step_id = 1, @step_name = N'备份', @command = N'backup database myfoxpro to disk= ''H:\Microsoft SQL Server\MSSQL\Data\myfoxpro.bak''
', @database_name = N'myfoxpro', @server = N'', @database_user_name = N'', @subsystem = N'TSQL', @cmdexec_success_code = 0, @flags = 0, @retry_attempts = 0, @retry_interval = 1, @output_file_name = N'', @on_success_step_id = 0, @on_success_action = 1, @on_fail_step_id = 0, @on_fail_action = 2
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback
EXECUTE @ReturnCode = msdb.dbo.sp_update_job @job_id = @JobID, @start_step_id = 1

IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

-- 添加作业调度
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobschedule @job_id = @JobID, @name = N'每周备份', @enabled = 1, @freq_type = 8, @active_start_date = 20051104, @active_start_time = 0, @freq_interval = 1, @freq_subday_type = 1, @freq_subday_interval = 0, @freq_relative_interval = 0, @freq_recurrence_factor = 1, @active_end_date = 99991231, @active_end_time = 235959
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

-- 添加目标服务器
EXECUTE @ReturnCode = msdb.dbo.sp_add_jobserver @job_id = @JobID, @server_name = N'(local)'
IF (@@ERROR <> 0 OR @ReturnCode <> 0) GOTO QuitWithRollback

END
COMMIT TRANSACTION
GOTO EndSave
QuitWithRollback:
IF (@@TRANCOUNT > 0) ROLLBACK TRANSACTION
EndSave:
/*以上的是在企业管理器中创建的作业。但有个不好的地方就是每周备份的文件名称会被覆盖，所以我想用日期做文件名。
declare @filename char(100)
set @filename='myfoxpro_'+convert(char(8),getdate(),112)+'.bak'''
然后把上面的@command语句修改为
@command =N'backup database myfoxpro to disk= ''H:\Microsoft SQL Server\MSSQL\Data\'+@filename
怎么老是出错，说43行，也就是这行。+号附近有错误？？
应该怎么做？才能每周备份的名字为那天的日期？