I'm sorry guys, but now I cheated!
I manually edited the cookie
And proceeded with the order flawlessly.
Please check your cookie script,
it doesn't update on changing the coupon code.
(Value stays N)
I think you have to add a line in cart.js
but I didn't look closely to verify where you set the cookies at all.
Oh btw: the whole javascript system is not a good idea,
because of various reasons:
1) javascripts are userside script that run on the client computer,
therefore they can be edited or don't run at all.
2) javascripts tend to make different things with the same code, depending on the users operating system, browser and javascript compiler
3) visible source code, lets people step over or in lines of interests
And now the shopping cart cookie
That's not a good idea too
You know I just edited the cookie to gain access to a discount.
I do think, that I could do this twice or three times with the same coupon code (without trying of course.)
keep your eyes up
'sid
Thanks
'sid