I want to configure EVDO Usb Modem in Ubuntu 10.10 I insert my usb modem to laptop and check the usb is detected or not using $sudo lsusb and the result is:

Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 201e:2009
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 14cd:6600 Super Top USB 2.0 IDE DEVICE 

Bus 002 Device 002: ID 201e:2009 is my us device. and than I execute command $dmesg | grep -e tty

[    0.000000] console [tty0] enabled
[  818.054660] usb 2-1.3: GSM modem (1-port) converter now attached to ttyUSB0
[  818.055125] usb 2-1.3: GSM modem (1-port) converter now attached to ttyUSB1
[  818.055647] usb 2-1.3: GSM modem (1-port) converter now attached to ttyUSB2
[  818.330641] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[  818.330743] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[  818.330840] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 1054.917473] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB0
[ 1054.917995] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB1
[ 1054.918481] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB2
[ 1055.214087] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 1055.214221] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 1055.214356] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2

Why converter disconnected from ttyUSB2 ?

and than I try to execute command $sudo wvdialconf

sorry, no modem was detected!  Is it in use by another program ?
did you configure it properly with setserials ? 

I change the same type usb modem from my friend, but I still get error above.