problema con d-unlocker

Hola. Hace un mes liberé un SE T303 con D-Unlocker sin problemas. Ahora intento hacer lo mismo con otro móvil del mismo modelo y siempre me da el mismo error:

17:47:33 D-Unlocker v2.32 by Cruiser Team
17:47:33 Initializing...
! 17:47:33 1. Please see the documentation first (a PDF installed with the application)
! 17:47:33 2. Make sure the appropriate phone modem drivers are installed (if applicable)
! 17:47:33 3. Fill in the connection settings under settings tab
! 17:47:33 4. Turn the phone ON
! 17:47:33 5. Connect the phone…
17:47:43 Connecting via SEMC USB Flash Device (USB2)…
17:47:43 Device driver version: 2.2.0.2
17:47:43 Device driver date: 12-5-2008
17:47:43 Starting communication...
17:47:44 Connecting to the baseband CPU...
17:47:46 IMEI: xxxxxxxxxxxxxxx
17:47:46 Sending loader...
17:47:51 Communicating with server…
17:47:55 Remainig credit (supreme): 0.45
E 17:47:55 Error: 0xE1E2479D
E 17:47:55 Error: 0x54CF635C
E 17:47:55 Error: 0x07F5EFDA
E 17:47:55 Error: 0x28FF3CA4
E 17:47:55 Unknown server problem [129]
E 17:47:55 Failed!
! 17:47:55 Please disconnect battery and cable from the phone!
! 17:47:55 To report errors right-click this window

¿Puede alguien ayudarme?