Refresh Worries On Shopping Cart

[Dikesuike]

I have implementd a a shopping cart using MS Access and Sessions. <BR>When I select the quantity for one of my products and am forwarded to the Shopping Cart Page the product only appears after pressing the refresh button. <BR>Can someone please offer a possible reason for this. <BR>Somebody has Suggested my browser caching might be playing a part. Can anyone offer a solution to this problem.<BR>Regards