how to reset SC admin password??

1)power on server
ALOM BOOTMON v1.6.1
ALOM Build Release: 001
Reset register: f0000000 EHRS ESRS LLRS SWRS

ALOM POST 1.0

Dual Port Memory Test, PASSED.
TTY External - Internal Loopback Test
TTY External - Internal Loopback Test, PASSED.
TTYC - Internal Loopback Test
TTYC - Internal Loopback Test, PASSED.
TTYD - Internal Loopback Test
TTYD - Internal Loopback Test, PASSED.
Memory Data Lines Test
Memory Data Lines Test, PASSED.
Memory Address Lines Test
  Slide address bits to test open address lines
  Test for shorted address lines
Memory Address Lines Test, PASSED.
Boot Sector FLASH CRC Test
Boot Sector FLASH CRC Test, PASSED.
2)press escape key
press e to erase ALOM NVRAM
press r to rebuturn boot prompt

Return to Boot Monitor for Handshake  ESC keypress detected.
ALOM <ESC> Menu
e - Erase ALOM NVRAM.
m - Run POST Menu.
R - Reset ALOM.
r - Return to bootmon.
Your selection: e
ALOM NVRAM erased.
ALOM <ESC> Menu
e - Erase ALOM NVRAM.
m - Run POST Menu.
R - Reset ALOM.
r - Return to bootmon.
Your selection: r
ALOM POST 1.0
   Status = 00007fff
Returned from Boot Monitor and Handshake

Instruction CACHE Test
  DISABLE the I-CACHE
  ENABLE the I-CACHE
  Verify I-CACHE Performance Increase
Instruction CACHE Test, PASSED.
Memory Cells Test
  Counting UP:    Write data:  00000000
  Counting DOWN:  Read - Verify - Write data:  ffffffff
  Counting UP:    Read - Verify - Write data:  55aa33cc
Memory Cells Test, PASSED.
Data CACHE Test
  Verify D-CACHE Performance Increase
    D-CACHE Performance Increase I-CACHE Disabled
    D-CACHE Performance Increase I-CACHE Enabled
  Verify D-CACHE Memory
Data CACHE Test, PASSED.
Main Sectors FLASH CRC Test
Main Sectors FLASH CRC Test, PASSED.
Loading the runtime image... VxWorks running.
Starting Advanced Lights Out Manager CMT v1.6.1
Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
Current mode: NORMAL
Attaching network interface lo0... done.
Attaching network interface motfec0.... done.
Booting from Segment 0

Sun(tm) Advanced Lights Out Manager CMT v1.6.1

SC Alert: SC System booted.

Full VxDiag Tests
BASIC TOD TEST
  Read the TOD Clock:
SC Alert: Preceding SC reset due to watchdog
TUE APR 29 03:33:28 2014
  Wait, 1 - 3 seconds
  Read the TOD Clock:        TUE APR 29 03:33:30 2014
BASIC TOD TEST, PASSED
ETHERNET CPU LOOPBACK TEST
  50 BYTE PACKET   - a 0 in field of 1's.
  50 BYTE PACKET   - a 1 in field of 0's.
  900 BYTE PACKET  - pseudo-random data.
ETHERNET CPU LOOPBACK TEST, PASSED
Full VxDiag Tests - PASSED

    Status summary  -  Status = 7FFF
       VxDiag    -          -  PASSED
       POST      -          -  PASSED
       LOOPBACK  -          -  PASSED
       I2C       -          -  PASSED
       EPROM     -          -  PASSED
       FRU PROM  -          -  PASSED
       ETHERNET  -          -  PASSED
       MAIN CRC  -          -  PASSED
       BOOT CRC  -          -  PASSED
       TTYD      -          -  PASSED
       TTYC      -          -  PASSED
       MEMORY    -          -  PASSED
       MPC885    -          -  PASSED

APR 29 03:33:35 FATAL: Check DIMM configuration, Not enough valid dram channels
APR 29 03:33:35 FATAL: No Valid MEMORY configuration
APR 29 03:33:35 FATAL: The HOST Processor has a configuration error, forcing a power-down
sc>
3) then reset password
sc> usershow
Warning: the usershow command is being ignored because the password for admin is not set.
Setting password for admin.
New password: *********
Re-enter new password: *********
sc> usershow
Username         Permissions      Password
admin            cuar             Assigned
sc>