pam_radius_auth on 64bit Linux doesn't work (fwd)

Hello, We are starting to deploy 64bit RH Linux systems (AS3). The 32bit module didn't work, and I had trouble getting the 64bit to compile successfully. For the sake of time, I found a 64bit pam_radius_auth RPM and installed it. It attempts to authenticate, but every packet gives an incorrect shared secret error on both sides. I've tried everything imaginable to get it to work with no success. The shared secrets are absolutely correct on both sides. Any success stories? Any ideas?