I've followed the instructions to configure a VPN between a netscreen device and a Cisco PIX as directed by Cisco's [netscreen to PIX VPN]http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a00801c4445.shtml article.

The only differences are that I'm running PIX 6.3(5) and Juniper Netscreen 6.1.0r2.0 (Firewall+VPN). I followed both configurations exactly, and when I try to connect, the Juniper returns with:

2010-02-21 12:54:28  information IKE: Removed Phase 2 SAs after receiving a notification message. 
2010-02-21 12:54:28  information IKE pix_public_IP: Received a notification message for DOI 1 14 NO-PROPOSAL-CHOSEN. 
2010-02-21 12:54:28  information IKE pix_public_IP Phase 2: Initiated negotiations. 

On the Netscreen, I've created a Phase 2 Proposal called ToCorpOffice using DH Group#2, 3DES-CBC, and SHA-1, and when configuring the AutoKey IKE, I chose ToCorpOffice and removed all other transforms. I believe I've configured the same on the PIX with:

sysopt connection permit-ipsec
crypto ipsec transform-set mytrans esp-3des esp-sha-hmac
crypto map mymap 10 ipsec-isakmp
crypto map mymap 10 match address nonat
crypto map mymap 10 set pfs group2
crypto map mymap 10 set peer netscreen_public_ip
crypto map mymap 10 set transform-set mytrans
crypto map mymap interface outside

Saved that and rebooted, so here's the cryptomap info: PIX-FW1# show crypto map

Crypto Map: "mymap" interfaces: { outside }

Crypto Map "mymap" 10 ipsec-isakmp
    Peer = netscreen_public_ip
    access-list nonat; 1 elements
    access-list nonat line 1 permit ip 192.168.1.0 255.255.255.0 192.168.2.0 255.255.255.0 (hitcnt=0)
    Current peer: netscreen_public_ip
    Security association lifetime: 4608000 kilobytes/28800 seconds
    PFS (Y/N): Y
    DH group:  group2
    Transform sets={ mytrans, }
PIX-FW1#

Any idea why I'm getting a NO-PROPOSAL-CHOSEN error?