Thank you so much for all your help. Here's the log details, with address, etc. removed, of course. Looks like a connection problem, or problem with headers?
thanks again, you absolutely rule.
USUNSPECIFIED126.96.36.199ECI267662817886/home/iheartgu/public_html/shop/includes/modules/payment/linkpoint_api/267662817886.pemsecure.linkpt.net11297.24 server responds: unable to use client certificate (no key found or wrong pass phrase?) ErrNo:58 server responds: FAILURECould not connect.
Warning: Cannot modify header information - headers already sent by (output started at /home/iheartgu/public_html/shop/includes/modules/payment/linkpoint_api/class.linkpoint_api.php:178) in /home/iheartgu/public_html/shop/includes/functions/functions_general.php on line 44