[fprint] No device detected

[Milan Jaros]

I read all troubleshooting and manuals. I was googling in I-mess. But i 
still can't find reason.
I know that my fprintreader is working propertly (i used it in Vista).
When I type su:
[CODE]Could not locate any suitable fingerprints matched with available 
hardware.[/CODE]
pam_fprint_enroll:
[CODE]No devices detected.[/CODE]

What kind of information do you need from my side?
Thank you.
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