Multi-parameters Issue In Data Flow Task SSIS

Hi all,

I met a problem when trying to pass values to a SQL statement through parameters. It's a data flow task. I used the OLE DB connection. My statement is like the statement below(the real statement is little complex):

Select * from myTable where mydate>? and mydate<?

I used the "set query parameter" dialogbox to bulid two parameters varStartTime and varEndTime, the values for the two parameters were set to "1/1/2005" and "12/30/2006" respectively. But when I click the "Parse query" button, I got errors

Parameter Information cannot be derived from SQL statements. Set parameter information before preparing command.

I have referred to the posts, but the problem still exists. Any help will be highly appreciated. Thanks a lot!