The problem of install solaris 10 using JumpStart!

有间茅屋

My configure : install server IP: 172.18.9.147 netmask : 255.255.248.0
                       install  client IP : 172.18.9.144 netmask : 255.255.248.0
                       defaultroute : 172.18.8.1
and the rest configure are no problem
but when i execute
OK boot net - install
display the following:
{6} ok boot net - install
Boot device: /pci@9,700000/network@1,1  File and args: - install
Timeout waiting for ARP/RARP packet
Timeout waiting for ARP/RARP packet
Timeout waiting for ARP/RARP packet
Timeout waiting for ARP/RARP packet
Timeout waiting for ARP/RARP packet
Timeout waiting for ARP/RARP packet
38800
Requesting Internet address for 0:3:ba:4d:e1:7c
SunOS Release 5.10 Version Generic_118833-17 64-bit
Copyright 1983-2005 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
SUNW,eri0 : 100 Mbps full duplex link up
whoami: no domain name

panic[cpu6]/thread=180e000: mutex_enter: bad mutex, lp=600014490f0 owner=180e000 thread=180e000

000000000180b280 nfs:nfs_async_stop+c (600014490f0, 0, 80, 60001448f80, 40, 80)
  %l0-3: 0000060001448f80 0000000000000000 0000060001447910 00000000018ba184
  %l4-7: 0000000000000005 0000000000000000 0000000000000000 00000300003b7640
000000000180b330 nfs:nfs3_mountroot+2cc (1882fb0, 97, 60001447930, 60001447920, 300003b7640, 60001401ee
  %l0-3: 0000000000000000 0000060001447910 0000060001481700 000000000127b000
  %l4-7: 0000000000000000 00000000018bf000 000000000180b3f4 00000300003b7640
000000000180b590 nfs:nfsdyn_mountroot+314 (1882fb0, 0, 18bc400, 18bc530, 60001481700, 60001447910)
  %l0-3: 000000000180b768 0000000000000000 0000060001447930 00000000018c2c00
  %l4-7: 00000300003b7640 00000300003b7640 00000000018bec00 0000060001447920
000000000180b7e0 swapgeneric:rootconf+180 (0, 18ac400, 185d518, 0, 183b5e0, 185dfe0)
  %l0-3: 00000000018af000 0000030000079358 0000000000000000 0000030000079330
  %l4-7: 0000000000000001 00000000018abc00 00000300000a2e00 00000000018ae800
000000000180b890 unix:stubs_common_code+70 (6000143c000, 0, 4, 0, 6000143c000, 3000007918
  %l0-3: 000000000180b149 000000000180b211 0000000000000000 0000030000fd9210
  %l4-7: 0000000000000000 0000000001817110 0000000000000001 0000000000000000
000000000180b950 genunix:vfs_mountroot+60 (800, 200, 0, 185d400, 1883000, 18af000)
  %l0-3: 0000000000001770 0000000000000640 0000000001814000 00000000000008fc
  %l4-7: 0000000001833c00 00000000018b1400 0000000000000600 0000000000000200
000000000180ba10 genunix:main+98 (18141a0, 1013800, 18362c0, 18abc00, 180e000, 1814000)
  %l0-3: 0000000070002000 0000000000000001 000000000180c000 000000000180e000
  %l4-7: 0000000000000001 0000000001074800 0000000000000060 0000000000000000

skipping system dump - no dump device configured
rebooting...

Resetting ...

Can some kind soul please tell me what 's the problem here
thanks