Chiavetta k3806 non riconosciuta (xubuntu 12.04)

Salve,

ho una chiavetta internet 3G codice k3806-Z.

Su Ubuntu 10.04, con sakis3g ero riuscito a farla funzionare. Adesso con la 12.04 nulla.

In network-manager proprio non la vede.

A questo punto: 1. Stoppo il network-manager
2. inserisco la chiavetta. Lampeggia rossa
nota: quando funzionava lampeggiava blu.
3. faccio partire sakis3g e mi da l'errore failed to connect, e basta.

C'e' un modo di farla funzionare?

Grazie

EDIT: questo e' l'output di quando provo a usare usb_modeswitch

usb_modeswitch -v 19d2 -p 1013 -P1015

Looking for default devices ...    
   found matching product ID    
   adding device    
 Found device in default mode, class or configuration (1)    
Accessing device 000 on bus 003 ...    
Getting the current device configuration ...    
Error getting the current configuration (error -1). Assuming configuration 1.    
Using first interface: 0x00    
Using endpoints 0x01 (out) and 0x81 (in)    
Inquiring device details; driver will be detached ...    
Looking for active driver ...    
 No driver found. Either detached before or never attached    
 Could not claim interface (error -1). Skipping device inquiry    
Error: could not get description string "manufacturer"    
Error: could not get description string "product"    
Error: could not get description string "serial number"    
USB description data (for identification)    
-------------------------    
Manufacturer:     
     Product:     
  Serial No.:     
-------------------------

Warning: no switching method given.    
-> Run lsusb to note any changes. Bye.