ni_pcimio Module "Use Count" Not Decremented

Config:  Debian/etch;       linux-2.6.17.14;  rtai-3.4-cv
         comedilib-0.7.22;  comedi-CVS

I first loaded all required RTAI and COMEDI modules, and ran
'comedi_config' to associate a driver with /dev/comedi0.

I then did the following:

      $ lsmod|head
      Module                  Size  Used by
 ==>  ni_pcimio              41344  0
      ni_tio                 10048  1 ni_pcimio
      ... ...
      
      $ sudo insmod diotest.ko
      $ lsmod|head
      Module                  Size  Used by
      diotest                 2944  0
 ==>  ni_pcimio              41344  1
      ni_tio                 10048  1 ni_pcimio
      ... ...
      
      $ sudo rmmod diotest
      $ lsmod|head
      Module                  Size  Used by
 ==>  ni_pcimio              41344  1
      ni_tio                 10048  1 ni_pcimio
      ... ...
   
Notice the "Used by" counts for 'ni_pcimio'.  The final one is
non-zero which prohibits my 'rmmod'ing it (unless the "-f" option is
included).  

Shouldn't 'rmmod'ing the 'diotest' module reduce the ni_pcimio count
back to `0'?

Apparently, RTAI's 'rtai-load' script doesn't include the "-f" on
'rmmod' which prohibits 'rtai-load' from removing all the loaded modules.

I've attached the ".runinfo" file below ... maybe that'll help ...

Any ideas?
-- 
Prof Kenneth H Jacker       khj_at_cs.appstate.edu
Computer Science Dept       www.cs.appstate.edu/~khj
Appalachian State Univ
Boone, NC  28608  USA