[Openswan Users] help!win2000 ----- openswan(with log)

[=?gb2312?B?zMbd7cDZ?=]

i have builded 
win98+certificates ---openswan
winxp+psk-----openswan
success
but i can not build win2000+certificates-----openswan
when i connected,it shows 
Error 786: The L2TP connection failed because there is no valid machine certificate on your computer for security authentication

this time i found the /var/log/secure

May  9 10:50:46 localhost pluto[1124]: packet from 192.168.0.68:500: ignoring Vendor ID payload [MS NT5 ISAKMPOAKLEY 00000002]
May  9 10:50:46 localhost pluto[1124]: packet from 192.168.0.68:500: ignoring Vendor ID payload [FRAGMENTATION]
May  9 10:50:46 localhost pluto[1124]: packet from 192.168.0.68:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02_n] method set to=106 
May  9 10:50:46 localhost pluto[1124]: "testcert2000" #1: responding to Main Mode
May  9 10:50:46 localhost pluto[1124]: "testcert2000" #1: transition from state STATE_MAIN_R0 to state STATE_MAIN_R1
May  9 10:50:47 localhost pluto[1124]: "testcert2000" #1: NAT-Traversal: Result using draft-ietf-ipsec-nat-t-ike-02/03: no NAT detected
May  9 10:50:47 localhost pluto[1124]: "testcert2000" #1: transition from state STATE_MAIN_R1 to state STATE_MAIN_R2
May  9 10:50:47 localhost pluto[1124]: "testcert2000" #1: next payload type of ISAKMP Hash Payload has an unknown value: 25
May  9 10:50:47 localhost pluto[1124]: "testcert2000" #1: malformed payload in packet
May  9 10:50:47 localhost pluto[1124]: "testcert2000" #1: sending notification PAYLOAD_MALFORMED to 192.168.0.68:500
May  9 10:50:47 localhost pluto[1124]: "testcert2000" #1: failed to build notification for spisize=0 
May  9 10:50:47 localhost pluto[1124]: "testcert2000" #1: next payload type of ISAKMP Hash Payload has an unknown value: 115
May  9 10:50:47 localhost pluto[1124]: "testcert2000" #1: malformed payload in packet
May  9 10:50:57 localhost pluto[1124]: "testcert2000" #1: ignoring informational payload, type INVALID_COOKIE
May  9 10:50:57 localhost pluto[1124]: "testcert2000" #1: received and ignored informational message
May  9 10:51:17 localhost pluto[1124]: "testcert2000" #1: ignoring informational payload, type INVALID_COOKIE
May  9 10:51:17 localhost pluto[1124]: "testcert2000" #1: received and ignored informational message
May  9 10:51:57 localhost pluto[1124]: "testcert2000" #1: max number of retransmissions (2) reached STATE_MAIN_R2

who can tell me what is wrong and tell me how to do ? thank you very very much!!!! 

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