FreeBSD vs pl2303

[Alexander]

Hi!
I have mobile phone Siemens CXV70 and USB data cable for it. When I 
attach phone to cable in Linux I can see, that device ttyUSB0 with 
driver pl2303 attached. On FreeBSD when I attach phone to cable I see 
ugen0 (uplcom, ucom, umodem loaded). When I try to change source code 
and add my vendor to uplcom - I received:
ucom0: Siemens AG Siemens USB Connectivity, rev 1.10/0.95, addr 3
ucom0: uplcom_reset: STALLED
ucom0: reset failed: NOMEM
device_attach: ucom0 attach returned 6

# usbdevs -v
Controller /dev/usb0:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), 
Intel(0x0000), rev 1.00
 port 1 addr 3: full speed, power 98 mA, config 1, Siemens USB 
Connectivity(0x0003), Siemens AG(0x11f5), rev 0.95
 port 2 addr 2: low speed, power 100 mA, config 1, Microsoft 3-Button 
Mouse with IntelliEye(TM)(0x0040), Microsoft(0x045e), rev 3.00
Controller /dev/usb1:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), 
Intel(0x0000), rev 1.00
 port 1 powered
 port 2 powered

How I can get this device to work?