I was stuck on this one for a bit because I tried to use the Perl SCMP Client to meet the dependencies, but instead I used the C SCMP Client and it worked. It installed to /opt/CyberSource/SDK/, which I made a symlink to that from /opt/ics/ because this module seems to expect it to be there. http://www.cybersource.com/support_center/implementation/downloads/scmp_api/ http://apps.cybersource.com/cgi-bin/pages/dev_kits.cgi?kit=_SCMP_Clients/C/Linux