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X509 roadwarrior; incomplete ISAKMP SA

I have problem with one of users trying to connect to ASL VPN.
VPN connection type  is roadwarrior with X.509 key. I think that problem is on users computer (win 2003 server), because I checked connection from my comupter (win 2000) with same key and username, and everything worked perfectly.
Clients on both comupters are native windows VPN clients.
I don't have access to users computer, so I cannot check it.

Here is log of connection:

pluto[4428]: packet from 193.2.123.45:500: ignoring Vendor ID payload [MS NT5 ISAKMPOAKLEY 00000004]                                          
pluto[4428]: packet from 193.2.123.45:500: ignoring Vendor ID payload [72872b95fcda2eb7...]                                                   
pluto[4428]: packet from 193.2.123.45:500: ignoring Vendor ID payload [FRAGMENTATION]                                                         
pluto[4428]: packet from 193.2.123.45:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02_n]                                       
pluto[4428]: packet from 193.2.123.45:500: ignoring Vendor ID payload [26244d38eddb61b3...]                                                   
pluto[4428]: "S_fov__l2tp_1"[5] 193.2.123.45 #323: responding to Main Mode from unknown peer 193.2.123.45                                     
pluto[4428]: "S_fov__l2tp_1"[5] 193.2.123.45 #323: transition from state (null) to state STATE_MAIN_R1                                        
pluto[4428]: "S_fov__l2tp_1"[5] 193.2.123.45 #323: NAT-Traversal: Result using draft-ietf-ipsec-nat-t-ike-02/03: no NAT detected              
pluto[4428]: "S_fov__l2tp_1"[5] 193.2.123.45 #323: transition from state STATE_MAIN_R1 to state STATE_MAIN_R2                                 
pluto[4428]: "S_fov__l2tp_1"[5] 193.2.123.45 #323: encrypted Informational Exchange message is invalid because it is for incomplete ISAKMP SA 
pluto[4428]: "S_fov__l2tp_1"[5] 193.2.123.45 #323: max number of retransmissions (2) reached STATE_MAIN_R2                                    
pluto[4428]: "S_fov__l2tp_1"[5] 193.2.123.45: deleting connection "S_fov__l2tp_1" instance with peer 193.2.123.45                             

Lines 2 and 5 are little bit strange to me, with working connections nothing similar appears in logs.

Any idea?


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