CURL request running into problems with SSL

[sreichgut]

I just inherited some code that uses the SOAP package to access a web service. When the Web Service is running on a standard HTTP box, everything works fine. However, when we have tried to move it to a box with SSL enabled we get the following error:
soap_fault Object
(
[error_message_prefix] =>
[mode] => 1
[level] => 1024
[code] => HTTP
[message] => curl_exec error 60 SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:func(144):reason(134)

From what I can tell, it looks like I need to change a couple of CURL options to resolve this issue. My problem is that I am not sure where I need to go to do this.

Code is running on PHP4 with SOAP Library version of 0.11.0.