全文索引从pdf文件流返回没有结果

I have a filestream table running on SQL Server 2012 on a Windows 8.1 x64 machine, which already have a few PDF and TXT files stored, so I decided to create a fulltext index to search through these files by using the following command:

CREATE FULLTEXT CATALOG FileStreamFTSCatalog AS DEFAULT;

CREATE FULLTEXT INDEX ON storage
(FileName Language 1046, File TYPE COLUMN FileExtension Language 1046)
KEY INDEX PK__storage__3214EC077DADCE3C
ON FileStreamFTSCatalog
WITH CHANGE_TRACKING AUTO;

然后我在阅读了一些和我有同样问题的人后发送了这些命令:

EXEC sp_fulltext_service @action='load_os_resources', @value=1;
EXEC sp_fulltext_service 'verify_signature', 0;
EXEC sp_fulltext_service 'update_languages';
Exec sp_fulltext_service 'ft_timeout', 600000;
Exec sp_fulltext_service 'ism_size',@value=16;
EXEC sp_fulltext_service 'restart_all_fdhosts';
EXEC sp_help_fulltext_system_components 'filter';
reconfigure with override

filter  .pdf    E8978DA6-047F-4E3D-9C78-CDBE46041603    C:Program FilesAdobeAdobe PDF iFilter 11 for 64-bit platformsinPDFFilter.dll  11.0.1.36   Adobe Systems, Inc.

select * from storage
where contains(*, 'data')

2014-08-20 06:32:09.48 spid29s     Warning: No appropriate filter was found during full-text index population for table or indexed view '[text_storage].[dbo].[storage_table]' (table or indexed view ID '355584405', database ID '7'), full-text key value '篰磧'. Some columns of the row were not indexed.

2014-08-19 22:14:50.58 spid20s     Warning: No appropriate filter was found during full-text index population for table or indexed view '[text_storage].[dbo].[storage]' (table or indexed view ID '674101442', database ID '7'), full-text key value '1797'. Some columns of the row were not indexed.