PPTP issues after Tiger Upgrade

Over the weekend, we moved a server from 10.3 to 10.4, and we've been unable to get the vpn to work, post upgrade. The vpnd.log reads: [code]2007-05-29 08:37:15 EDT Listening for connections... 2007-05-29 08:37:18 EDT Incoming call... Address given to client = 10.0.0.211 Tue May 29 08:37:18 2007 : Directory Services Authentication plugin initialized Tue May 29 08:37:18 2007 : Directory Services Authorization plugin initialized Tue May 29 08:37:18 2007 : PPTP incoming call in progress from 'scrubbed IP'... Tue May 29 08:37:18 2007 : PPTP connection established. Tue May 29 08:37:18 2007 : using link 0 Tue May 29 08:37:18 2007 : Using interface ppp0 Tue May 29 08:37:18 2007 : Connect: ppp0 socket[34:17] Tue May 29 08:37:18 2007 : sent [LCP ConfReq id=0x1 ] Tue May 29 08:37:18 2007 : rcvd [LCP ConfReq id=0x1 ] Tue May 29 08:37:18 2007 : lcp_reqci: returning CONFACK. Tue May 29 08:37:18 2007 : sent [LCP ConfAck id=0x1 ] Tue May 29 08:37:18 2007 : rcvd [LCP ConfAck id=0x1 ] Tue May 29 08:37:18 2007 : sent [LCP EchoReq id=0x0 magic=0x55d993a3] Tue May 29 08:37:18 2007 : sent [CHAP Challenge id=0x59 , name = "fqdn for real server"] Tue May 29 08:37:18 2007 : rcvd [LCP EchoReq id=0x0 magic=0xfdb3d38f] Tue May 29 08:37:18 2007 : sent [LCP EchoRep id=0x0 magic=0x55d993a3] Tue May 29 08:37:18 2007 : rcvd [LCP EchoRep id=0x0 magic=0xfdb3d38f] Tue May 29 08:37:18 2007 : rcvd [CHAP Response id=0x59 , name = "someusername"] Tue May 29 08:37:19 2007 : DSAuth plugin: Failed to retrieve MPPE encryption keys from the password server. Tue May 29 08:37:19 2007 : sent [CHAP Success id=0x59 "S=E200A4D8E399517053643DADC4F0E8BFC83A4AB0 M=Access granted"] Tue May 29 08:37:19 2007 : DSAccessControl plugin: User 'admin' authorized for access Tue May 29 08:37:19 2007 : MPPE required, but keys are not available. Possible plugin problem? Tue May 29 08:37:19 2007 : sent [LCP TermReq id=0x2 "MPPE required but not available"] Tue May 29 08:37:19 2007 : rcvd [CCP ConfReq id=0x1 ] Tue May 29 08:37:19 2007 : rcvd [LCP TermAck id=0x2] Tue May 29 08:37:19 2007 : Connection terminated. Tue May 29 08:37:19 2007 : Connect time 0.1 minutes. Tue May 29 08:37:19 2007 : Sent 0 bytes, received 0 bytes. Tue May 29 08:37:19 2007 : PPTP disconnecting... Tue May 29 08:37:19 2007 : PPTP disconnected 2007-05-29 08:37:19 EDT --> Client with address = 10.0.0.211 has hungup[/code] When I looked around for this particular issue, I found [url=http://docs.info.apple.com/article.html?artnum=107915]this technote[/url] which suggests that it's lack of a vpnkeyuser, so I ran the [code]sudo /usr/sbin/vpnaddkeyagentuser /LDAPv3/127.0.0.1[/code] command and restarted the VPN service, but I'm still getting the same message... Anyone see the error of my ways?