[strongSwan] strongswan host to host setup problem

[Aaron]

Hi, I have strongswan setup in a host to host configuration using a shared
secret for testing, but am not able to get it to establish a tunnel.  The
left side attempts to retransmit packets till it gives up and on the right
side I receive this error.  Any help appreciated.  Thanks!

Jul 16 21:01:19 vpn02 charon: 12[NET] received packet: from
10.100.1.20[500] to 10.100.1.131[500] (36 bytes)
Jul 16 21:01:19 vpn02 charon: 12[ENC] parsed IKE_SA_INIT response 0 [
N(NO_PROP) ]
Jul 16 21:01:19 vpn02 charon: 12[IKE] received NO_PROPOSAL_CHOSEN notify
error

#ipsec.conf file
#right side and leftside are identical
config setup
        charondebug=all

conn %default
        ikelifetime=60m
        keylife=20m
        rekeymargin=3m
        keyingtries=1
        keyexchange=ikev2
        authby=psk

conn rw
        left=10.100.1.20
        leftid=10.100.1.20
        leftfirewall=no
        right=10.100.1.131
        rightid=10.100.1.131
        auto=start
        authby=psk

# ipsec.secrets file
: PSK "mypsksecret"
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