[How to link date parameters in query to retrieve the correct data]

i am using two date parameters $P{StartDate} AND $P{EndDate}  and having a query like 

SELECT DISTINCT

     expirydate.`ArticleName` AS expirydate_ArticleName,

     medicinelist.`Pos` AS medicinelist_Pos,

     medicinelist.`Quantity` AS medicinelist_Quantity,

     expirydate.`ExpirationDate` AS expirydate_ExpirationDate

FROM

     `expirydate` expirydate INNER JOIN `medicinelist` medicinelist ON expirydate.`Barcode` = medicinelist.`Barcode`

WHERE expirydate_ExpirationDate BETWEEN $P{start_date} AND $P{end_date}

order by medicinelist_Pos

it showing error

"Parameter type not supported in query : start_date class net.sf.jasperreports.types.date.DateRange".

 

How can i  fix the issue???