authorizeNet stopped working

[sector33]

For a long while authorizeNet was working fine on our server. We have two sites.. and BOTH are now not working.

 

I tried to use the AIM authorizenet contribution. When I use that.. after submitting (successful to authnet) I am taken to a BLANK checkout_process.php page.

 

When I try to use the original authNet module I get the following message:

 

An error occurred while trying to report this transaction to the Merchant. An e-mail has been sent to the merchant informing them of the error. The following is the result of the attempt to charge your credit card.

 

Specs:

osCommerce 2.2-MS2