How to Control Exp16a

Hi,
 
I have succefully installed the comedi das08 (version 7.53) driver and
comedilib (version 0.7.19) on a SuSE8.1 (kernel 2.4.20). I load modprobe
das08 and dev/comedi0 on the correct address (0x300). I also load
8255.o, I don't know if I need this one. 
 
My questions:
- When I run the test program inpn I can't see the correct connected
voltage (2.5 Volts) on channel 0 (exp16).
- I have a Exp16 connected on a das08 card. What is the comedi command
for selection a channel of the EXP16a? I know that I must set the
digital output of the das08, but how?
 
I try this configuration several months ago on a SuSE7.1. Everything
works fine.with other words my cards are ok. But this machine is crashed
so I configure a new machine (SuSE8.1)
 
Thijs.
The Netherlands