MS access between clause not Working

MS access between clause not Working(between 2 dates).

My query is below:

SELECT     [Supplier].sname, 

           [Supplier].scontact, 

           [Supplier].sadd, 

           [Purchase].qnt, 

           [Purchase].item, 

           [Purchase].price, 

           [Purchase].priceperkg, 

           [Purchase].date, 

           [Purchase].suppid, 

           [Purchase].purchaseid 

FROM       Purchase 

INNER JOIN Supplier 

ON         Purchase.suppid = Supplier.sid 

WHERE      [Purchase].date BETWEEN date= ? AND ?