CyberCash Module Problems

I have attempted to compile PHP with the CyberCash module. I have run ./configure --with-cybercash=mckdir, and all appeared to go fine, but when I call the cybercash functions I get a fatal error call to undefined function. I've tried to spot the line that says Checking for CyberCash ..... Yes, but everything scrolls by so fast I can't see it. Once I did a ./configure.... |grep CyberCash, and I got errors, but I was returned a line that said Cybercash .... Yes, so I figured a normal ./configure --with-cybercash would work. I'm on RedHat 7.2 and PHP 4.1.1. I would be happy to have ideas on how to proceed or hear of other's success stories with PHP and CyberCash. Thanks! Gabe