[Nut-upsuser] communications lost/established

[ricman at neomedia.it]

ups: atlantis-land HostPower Sinewave Line Interactive 1501 A03-HP1501
distro: ubuntustudio 9.10
nut: 2.4.1
driver: megatec_usb


using upsc i can get ups value (voltage, battery, etc) but on terminal i get
lots and lots of these messages:

-------------------------------------------------------------

Broadcast Message from nut at maialinux                                           
        (somewhere) at 2:40 ...                                                
                                                                               
Communications with UPS myups at localhost lost                                   
                                                                               
                                                                               
Broadcast Message from nut at maialinux                                           
        (somewhere) at 2:40 ...                                                
                                                                               
Communications with UPS myups at localhost established

-------------------------------------------------------------

and /var/log/daemon.log is full of

Mar 14 02:42:35 maialinux megatec_usb[2767]: ser_send_pace: Device detached?
(error -5: error sending control message: Operation not permitted)
Mar 14 02:42:35 maialinux megatec_usb[2767]: Successfully reconnected
Mar 14 02:42:35 maialinux upsmon[2776]: Poll UPS [myups at localhost] failed - Data
stale
Mar 14 02:42:35 maialinux upsmon[2776]: Communications with UPS myups at localhost
lost
Mar 14 02:42:37 maialinux upsd[2769]: UPS [myups] data is no longer stale
Mar 14 02:42:39 maialinux megatec_usb[2767]: ser_send_pace: Device detached?
(error -5: error sending control message: Operation not permitted)
Mar 14 02:42:39 maialinux megatec_usb[2767]: Successfully reconnected


any ideas?
thanx