[Openswan Users] openswan IPSec subnet connection

[amin mosayyebzadeh]

Hi everybody
I have a problem with net_to_net connection.
after establishing net to net connection, so we can ping a node on the
other subnet by a node in this subnet,
but, it announce a notification
pluto[899]: "right_to_leftsubnet" #2: message ignored because it
contains an unexpected payload type (ISAKMP_NEXT_HASH)
pluto[899]: "right_to_leftsubnet" #2: sending encrypted notification
INVALID_PAYLOAD_TYPE to 192.168.1.90:500

after 20 notification, it says that reach to max notification number,
and connection is canceled.
can anybody says why this notification appears? I set ike and esp as
the same on the other gateway.