title: Sagepay redirects to Magento empty cart page
body: <p>I have setup the ebizmarts plugin with my Magento store, everything works great. The user gets sent to Sagepay, the payment is processed, the user receives Sagepay email. But the redirect goes to the empty cart page instead of the success page.</p>
  
  <p>Any suggestions would be very much appreciated.</p>
  
  <p>Thanks in advance</p>
  
  <p>Please note:
  This was working fine, the only thing I have changed and not sure if it is a coincidence is I added a tax rule to the product, and after reading through various forums some say it could may be a (suhosin.get.max_value_length directive problem) so adding tax would this go beyond the max length.</p>