OpenBravo POS authorize.net configuration

I have Openbravo 2.3.2 installed on a windows XP machine. I'm having problems with [login to view URL] credit card transactions. I'm able to run the transactions through the web virtual terminal fine, but when I try to run them through OpenBravo POS it comes back with, error 57. After speaking with [login to view URL], I found the problem is with the OpenBravo POS software. The software is not sending the right data. I've tried it with just keying the information in with the keyboard and I've also tried it with using the card reader. Neither of them works. I've searched the internet for solutions and it seems that some solutions are out there, but I don't understand them. I need someone to help with this problem asap. Thank you, Rob