Authorize.net setup

[chrismole]

A couple questions....

1. Is the Authorize.net mod using SIM or AIM?
2. I setup Authorize.net and configured all the fields in the admin. When I test a checkout, I am getting this error message at the top of the checkout_payment.php page:

The server cannot connect to Authorize.net. Please check your cURL and server settings.

Any ideas on where I need to fix? I've got cURL setup and the path entered inthe admin. If it's on the Authorize.net side, please let me know if it's SIM or AIM settings...

Thx,
C

[chrismole]

When I change the admin to "Test and Debug" mode, I get these errors:

Warning: fopen("./authnet_debug.txt", "a") - Permission denied in /www/shop/includes/modules/authorizenet_direct.php on line 117

Warning: fputs(): supplied argument is not a valid File-Handle resource in /www/shop/includes/modules/authorizenet_direct.php on line 118

Warning: fclose(): supplied argument is not a valid File-Handle resource in /www/shop/includes/modules/authorizenet_direct.php on line 119

Fatal error: Call to undefined function: curl_init() in /www/shop/includes/modules/authorizenet_direct.php on line 150