[Nut-upsuser] Data stale & Got disconnected by another driver: Device or resource busy

[Алексей]

Good day all and sorry my English.
I have some problem when updating NUT. I have server with 4 UPS connected. 
When I starting upsdrv and upsd and after sometime (1-2 minutes) I can't get 
data from ups's
# upsc apc at localhost battery.type
Error: Data stale

and errors in /var/log/{syslog,debug,daemon.log}
usbhid-ups[2385]: Got disconnected by another driver: Device or resource busy

OS: Gentoo Linux 2.6.29 hardened
NUT version: 2.4.1-r1 (snmp ssl usb)

Please help...

-- 
С уважением Алексей В. Лесовский
ЗАО "Березовский электрометаллургический завод"
ЗАО "Уральский завод прецизионных сплавов"
системный администратор ОАСУ
ICQ: 246016688