Just why exactly doesnt cdparanoia work?

[Petr Janda]

levator# cdparanoia -v -g /dev/acd0a "2"
cdparanoia III release 9.8 (March 23, 2001)
(C) 2001 Monty <monty at xxxxxxxx> and Xiphophorus
Report bugs to paranoia at xxxxxxxx
http://www.xiph.org/paranoia/
               Could not open SCSI device: cam_lookup_pass: CAMGETPASSTHRU ioctl failed
cam_lookup_pass: No such file or directory
cam_lookup_pass: either the pass driver isn't in your kernel
cam_lookup_pass: or acd0 doesn't exist: No such file or directory
The pass driver is in my kernel.

Any clues?