Help with date query needed

Hi,

We have a database with dates stored as day, month and year fields and need to build a query that returns a recordset for only those dates that fall within the current date. For some reason the query returns records that are always a day too late or a day too early. Has anyone got a better way of writing this query? We are on MSSQL 2008r2. The query we have so far is:

    select * from mydatabase where

    DATEADD( day, -1, CAST(CAST(DateFromYYYY AS varchar) + '-' + CAST(DateFromMM AS varchar) + '-' + CAST(DateFromDD + 1 AS varchar) AS DATETIME) ) <= GETDATE() AND

    DATEADD( day, -1, CAST(CAST(DateToYYYY   AS varchar) + '-' + CAST(DateToMM   AS varchar) + '-' + CAST(DateToDD AS varchar) AS DATETIME) ) >= GETDATE()

The fields we have are DateFromYYYY, DateFromMM amd DateFromDD and DateToYYYY, DateToMM amd DateToDD and they are varchars. We can't change the fields in the database as this is a legacy system. Basically we build each date string on-the-fly and then compare to see if it falls within the current date using GETDATE(). Our results are never accurate unfortunately. Any help appreciated.