One-Wire Weather

Hi.. i have a problem installing OWW on my debian..
It shows like this :
debian:/home/edo/oww-asus/root# owwnogui
Error when loading setup from /usr/local/etc/oww/devices
No devices file found. You must use the devices dialogue.
Error when loading setup from /usr/local/etc/oww/stats
Setup read from: /usr/local/etc/oww/setupNG
Devices read from: /usr/local/etc/oww/devices
1-wire Error: Open COM Failed
1-wire Error: Failed to initialize system resource
1-wire Error: Open COM Failed
1-wire Error: Failed to initialize system resource
1-wire Error: Open COM Failed
1-wire Error: Failed to initialize system resource

Could someone please help me?