Thanks for taking the time to reply.
The error message in the cart is this:
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.
The debug log is this:
Mar-05-2011 01:47:42
Communication Result: 7 - couldn't connect to host
Response Code: < <
=================================
Sending to Gateway:
*** REMOVED BY MODERATOR ***
Result: proved>FAILURE</r_approved><r_error>Could not connect.</r_error>
Communication Result: 7 - couldn't connect to host
CURL info: Array
(
[url] => https://secure.linkpt.net:1129/LSGSXML
[content_type] =>
[http_code] => 0
[header_size] => 0
[request_size] => 0
[filetime] => -1
[ssl_verify_result] => 0
[redirect_count] => 0
[total_time] => 21.111751
[namelookup_time] => 0.110947
[connect_time] => 0
[pretransfer_time] => 0
[size_upload] => 0
[size_download] => 0
[speed_download] => 0
[speed_upload] => 0
[download_content_length] => -1
[upload_content_length] => -1
[starttransfer_time] => 0
[redirect_time] => 0
)