[Users] cannot respond to IPsec SA request

Hello, I use Freeswan 2.02 with X509 Patch and Kernel 2.4.22 and want to test ipsec in my lan.

Linuxgateway                          Windows XP Client
192.168.0.80|-------------------------|192.168.0.7

after ping 192.168.0.80 from the xp-client the following messages appear:
(see "cannot respond to IPsec SA request because no connection is known for
192.168.0.80 ...")

Sep 27 17:32:46 wgserver pluto[19076]: packet from 192.168.0.7:500: received Vendor ID Payload; ASCII hash: \036+Qi\005\031\034}|\026|?5\007da Sep 27 17:32:46 wgserver pluto[19076]: "armin" #4: responding to Main Mode Sep 27 17:32:46 wgserver pluto[19076]: "armin" #4: Peer ID is ID_DER_ASN1_DN: 'C=DE, ST=wg, O=wg, OU=wg, CN=Armin' Sep 27 17:32:46 wgserver pluto[19076]: "armin" #4: sent MR3, ISAKMP SA established
Sep 27 17:32:46 wgserver pluto[19076]: "armin" #4: cannot respond to IPsec SA request because no connection is known for 192.168.0.80[C=DE, ST=wg, O=wg, OU=wg, CN=gateway]...192.168.0.7[C=DE, ST=wg, O=wg, OU=wg, CN=Armin] Sep 27 17:32:47 wgserver pluto[19076]: "armin" #4: Quick Mode I1 message is unacceptable because it uses a previously used Message ID 0x45e797c6
(perhaps this is a duplicated packet)

What's wrong now?

Armin

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