Coupon not found

Hi,
Having a problem trying to setup a free shipping coupon for an upcoming promo.
Joomla 1.5.26, Virtuemart 1.1.8, AWO Coupon 1.5.2pro
Website: hotdogsalldressed.com
Coupon code "FREESHIP"

Just gives me "FREESHIP: Coupon code not found. Please try again." when I try to use it.

Install check looks ok, Setup looks ok:
Function Type: Coupon
Function Type 2: Shipping
Coupon Code: FREESHIP
Published: Published
% or Amt: Percent
Discount Type: Overall
Value: 100.00000

Number of Uses: blank
Min Value: Overall/Blank
Start Date: 01-Jun-2013
End Date: 30-Jun-2013
Admin Note: Shipping Promo

All Customers/All Shipping/All Products


Any tips/ideas?

Thanks.....Vince

Problem solved. Was caused by config setting "Enable entry of shipping coupon before shipper is selected", needed to be set to "yes". Many thanks to Seyi.