I use payjunction for my credit card processing. I found a module on this site to install. Here is the problem:

I am setting up a new payment module for my credit card processing. I am using Payjunction. (payjunction.com). Anyways, when I upload the module and go to payment in the admin console to try and actually install it-- I keep receiving this error:

Fatal error: Cannot redeclare class pj in /.../includes/modules/payment/pj.php on line 433

I have yet to learn php, so I'm sorry. When I opened the file up in dreamweaver- this is what the code says in that area:

LINE 430: function keys() {
LINE 431: return array('MODULE_PAYMENT_PJ_STATUS', 'MODULE_PAYMENT_PJ_COLLECT_CVV', 'MODULE_PAYMENT_PJ_EMAIL', 'MODULE_PAYMENT_PJ_ZONE', 'MODULE_PAYMENT_PJ_ORDER_STATUS_ID', 'MODULE_PAYMENT_PJ_SORT_ORDER');
LINE 432: }
LINE 433: }
LINE 444:?>



Relevant Information:
- Zencart Version 1.3.8a

Can anyone help or lead me in the right direction? I've been searching for 2 days on google about the error and maybe it's because I don't know any php- but I can't find anything. I am fairly tech savvy as far as html etc goes.. so i'm not completely lost!