Upload CSS Button Click - Exception

>
> Hi to all,
>
> I have configured my orbeon to use mysql DB. Now here s my problem. When i
> click upload css from my form builder and select a css file, i am getting
> the error
>
>                  "error in communicating with the database. please contact
> the administrator"
>
> when i checked orbeon log the following exception was present
>
>
>
>
> -----------------------------------------------------------------------------------------------------
>
>
> 2010-03-26 19:18:05,739 ERROR SQLProcessor  - PreparedStatement:
>
>
>                                                  insert
>                                                      into
> orbeon_form_data_attach
>                                                        (created,
> last_modified, username, app, form, document_id, deleted,
>                                                            file_name,
> file_content)
>                                                               select case
> when last_deleted is null or last_deleted = 'Y' then
>         ?
>        else
>        last_created
>        end as lc,
>
>                                                             ? ,
>                                                             ? ,
>                                                             ? ,
>                                                             ? ,
>                                                             ? ,
>
>                                                            'N',
>                                                             ? ,
>                                                                 ?
>        from (
>    select v1.*,  (
>        select deleted
>        from orbeon_form_data_attach
>        where
>            app =  ?
>            and form =  ?
>                and document_id =  ?
>                and file_name =  ?
>            and last_modified = v1.last_last_modified
>            ) last_deleted
>            from
>    (select max(last_modified) last_last_modified , max(created)
> last_created
>    from (
>            select max(last_modified) last_modified, max(created) created
>            from orbeon_form_data_attach
>            where
>                app =  ?
>                and form =  ?
>                    and document_id =  ?
>                    and file_name =  ?
>         union all  select null last_modified, null created from dual
>    )v2) v1 )v;
>
> 2010-03-26 19:18:05,739 INFO  DatabaseContext  - Rolling back JDBC
> connection for datasource:
> [com.mysql.jdbc.Driver|jdbc:mysql://localhost:3306/orbeon03232010|root].
> 2010-03-26 19:18:05,927 ERROR ProcessorService  - Exception at line 321 of
> oxf:/apps/cps/persistence/mysql/crud.xpl
> org.orbeon.oxf.common.OXFException: Invalid sql-type attribute: blob
>        at
> org.orbeon.oxf.processor.sql.interpreters.QueryInterpreter.end(QueryInterpreter.java:582)
>
>
> -----------------------------------------------------------------------------------------------
>
>
> Now i am seeking some ones help !!!   :(
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>
>
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>