powerstore2 not accepting payments
i have powerstore 2 set up as a demo whilst i am testing everything, the wa_globals is all set up for paypal sandbox and i have inserted the signatures and user/pass etc, as soon as you put in your details c/card atc and submit it asks for you to confirm payment etc, then it shows on the screen could not complete you payment, there is a problem with your credit card or address, it also dosnt work when you use the express checkout at the top of the page, it does not register on the site that you have made a transaction.
whilst i am testing the site do i need to have a ssl certificate etc, wuld this affect why it isnt working yet.
p.s the error i get
Transaction Not Completed
Your transaction could not be completed. Either your credit card information or billing address has problems and cannot be processed
Please return to checkout and try again