Site-to-Site VPN zwischen Watchguard und Fortigate

Hallo,

habe ein Problem bei einer VPN Verbindung....

anbei das Log der Watchguard
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)Received fifth message with policy [gw-yaveon] from y.y.y.y:500 main mode
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)IkeMMProcessIDMsg : SAState.sState(7)
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)IkeMMProcessIDMsg : Calling IkePrepareIsakmpKeyMat()
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)IkeMMProcessIDMsg : Calling IkeCipherMsg()
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)IkeCheckPayloadsG: Payload(5) Len(21)
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)IkeCheckPayloadsG: Payload(8) Len(24)
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)IkeCheckPayloadsG: Payload(11) Len(28)
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)IkeNotifyPayloadNtoH : SPI Size 16 first4(0xabf2ee57)
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)Received an INITIAL_CONTACT message from y.y.y.y:500
<156>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)Ignored the INITIAL_CONTACT (repeated) from y.y.y.y:500
<156>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)WARNING: Mismatched ID settings at peer y.y.y.y:500 caused an authentication failure
<155>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)Process 5/6 Msg : failed to process ID payload
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)Cannot process MM ID payload from y.y.y.y:500 to x.x.x.x cookies i=57eef2ab 9acb2837 r=3826b559 87bcd610
<158>Jan 15 16:02:25 iked[2210]: (x.x.x.x<->y.y.y.y)ike_process_pkt : ProcessData returned error (-1)

Leider kenn ich mich mit Watchguard nicht so gut aus... Kann mir vllt. jemand aufgrund des Log's einen Lösungsansatz geben?

Grüße

Christian