gpg的使用????

风吹雪

编译过程中出现一下错误
..................
Now signing changes and any dsc files...
signfile binutils-arm-linux_2.15-5.dsc root <root@fengchuixue>
gpg: skipped `root <root@fengchuixue>': secret key not available
gpg: [stdin]: clearsign failed: secret key not available
debsign: gpg error occurred!  Aborting....
debuild: fatal error at line 787:
running debsign failed
已经生成了root的密钥并注册了.是不是下载作者的公钥呢?
看了看gpg的资料还是比较糊涂,英文一知半解,请问如何解决?
fengchuixue:~# gpg --list-keys root
pub  1024D/10F45CFB 2005-04-03 fengchuixue (test2) <root@fengchuixue>
sub  1024g/0135C8B0 2005-04-03