fingerprint-gui can not recognize my upek reader (147e:1002)

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http://askubuntu.com – I've got a new laptop which is Lenove's E420s. And I have encountered a big problem that I can't make the fingerprint reader work properly. I've also tried fingerprint-gui. But unfortunately, it's told that "No Device Found". Here is my screenshot: http://ge.tt/98Xg2WD/v/0 It's said that 147e:1002 is supported by fingerprint-gui on the official website. So, I'm curious about the situation. Anybody knows? P.S: I'm using gentoo, but I think this problem may not have anything to do with distribution since I compiled the source from official site. (HowTos)