Complete OsCommerce HSBC CPI Install

I had the HSBC CPI Payment gateway installed and running perfectly on my old server. I have since moved to a new server and now I cannot get the payment gateway to work - I keep getting the 'Hacking Attempt' error during the checkout process. WHEN VIEWING THE SOURCE ON [login to view URL] I CAN SEE THAT THE ORDER HAS IS *NOT* BEING SHOWN! When testing the [login to view URL] file supplied by HSBC everything appears to be working fine. Everything should be installed correctly includinf the .so files in usr/lib/, mcrypt / mhash are installed and the site has an SSL certificate. I cannot see any reason why this isn't working. I need someone to complete the installation for me. Sadly, I don't have much money to spend on this job. It should be simple for someone with experience in this field. Thanks