Zen Cart: v1.5.4
Module: FirstData/Linkpoint/YourPay API
OS: Amazon Linux 64bit

I move the site from one server to another. I was using v1.5.4 before the move, and I installed a fresh copy on the new server. I then exported and imported the database, and downloaded and uploaded the includes folder.

I don't know if the previous server was 32bit or 64bit, but the new server is 64bit. I have tried it with the old SSL certificates and with new ones. My original and new certificates were issued from Comodo.

When a user tries to process a transaction on my webstite: https://www.AKCertification.org, they get an error message that reads, "We apologize for the inconvenience, but we are presently unable to contact the Credit Card company for authorization. Please contact the Store Owner for payment alternatives." I have been and still am using the same PEM file. I downloaded it again from FirstData, and it is identical to the old one.

When I run the /extras/curltester.php?details=on I get an error, which I believe is the issue. I'm just not sure what the issue is. The error is:
Connecting to LinkPointAPI server (port 1129)...

Error 56: NSS: client certificate not found (nickname not specified)

Connection Details:
Array
(
[url] => "https://secure.linkpt.net/LSGSXML"
[content_type] =>
[http_code] => 0
[header_size] => 2
[request_size] => 213
[filetime] => -1
[ssl_verify_result] => 0
[redirect_count] => 0
[total_time] => 0.349252
[namelookup_time] => 0.060591
[connect_time] => 0.105362
[pretransfer_time] => 0.290279
[size_upload] => 37
[size_download] => 278
[speed_download] => 795
[speed_upload] => 105
[download_content_length] => -1
[upload_content_length] => 37
[starttransfer_time] => 0.349244
[redirect_time] => 0
[redirect_url] =>
[primary_ip] => 208.72.248.102
[certinfo] => Array
(
)

[primary_port] => 1129
[local_ip] => 172.31.28.95
[local_port] => 48726
)

Any direction in trouble shooting this and getting payments working again will be appreciated.