Error like this showed up in the PPPoA Log:
Regards,
2012:03:10-00:47:49 asg pppoa-sh: pptpc[5883] pppd: : call REF_RIRiDatVxB ipparam eth1#REF_RIRiDatVxB failed
2012:03:10-00:47:49 asg pppoa-sh: pptpc[5883] pptp: call manager or gre-gateway failed
2012:03:10-00:47:49 asg pppoa-sh: pptpc[5883] one or more processes missing
2012:03:10-00:47:49 asg pppoa-sh: pptpc[5883] shutting down pptp connection 10.0.0.138
2012:03:10-00:47:54 asg pppoa-sh: pptpc[5883] removing UNIX domain socket /var/run/pptp/10.0.0.138
2012:03:10-00:47:54 asg pppoa-sh: pptpc[5883] encountered 1 errors so far
2012:03:10-00:47:54 asg pppoa-sh: pptpc[5883] connection terminated after 15 sec
2012:03:10-00:47:54 asg pppoa-sh: pptpc[5883] connection terminated prematurely
2012:03:10-00:47:54 asg pppoa-sh: pptpc[5883] restarting connection in 5 sec
2012:03:10-00:47:54 asg pppoa-sh: pptpc[5883] 1/3 critical error threshold
2012:03:10-00:48:24 asg pppoa-sh: pptpc[5883] initiating PPTP connection
2012:03:10-00:48:24 asg pppoa-sh: pptpc[5883] waiting 10 sec for ip-up script
2012:03:10-00:48:24 asg pppd-pppoa[6010]: pppd 2.4.6 started by (unknown), uid 0
2012:03:10-00:48:24 asg pppd-pppoa[6010]: Couldn't open pty slave /dev/pts/0: No such file or directory
2012:03:10-00:48:24 asg pppd-pppoa[6010]: using channel 6
2012:03:10-00:48:24 asg pppd-pppoa[6010]: Using interface ppp0
2012:03:10-00:48:24 asg pppd-pppoa[6010]: Connect: ppp0 /dev/ttyp0
2012:03:10-00:48:25 asg pppd-pppoa[6010]: sent [LCP ConfReq id=0x1 ]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: rcvd [LCP ConfReq id=0xb2 ]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: sent [LCP ConfAck id=0xb2 ]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: rcvd [LCP ConfRej id=0x1 ]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: sent [LCP ConfReq id=0x2 ]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: rcvd [LCP ConfAck id=0x2 ]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: sent [LCP EchoReq id=0x0 magic=0x3eaff7c7]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: peer refused to authenticate: terminating link
2012:03:10-00:48:25 asg pppd-pppoa[6010]: sent [LCP TermReq id=0x3 "peer refused to authenticate"]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: rcvd [CHAP Challenge id=0x1 , name = "W-S-PE1909"]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: Discarded non-LCP packet when LCP not open
2012:03:10-00:48:25 asg pppd-pppoa[6010]: rcvd [LCP EchoRep id=0x0 magic=0x4a3649e9]
2012:03:10-00:48:25 asg pppd-pppoa[6010]: rcvd [LCP TermAck id=0x3] 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ...
2012:03:10-00:48:25 asg pppd-pppoa[6010]: Connection terminated.
2012:03:10-00:48:25 asg pppd-pppoa[6010]: Script /usr/sbin/pptp-current 10.0.0.138 --nolaunchpppd finished (pid 6011), status = 0x0
2012:03:10-00:48:25 asg pppd-pppoa[6010]: Exit.
2012:03:10-00:48:34 asg pppoa-sh: pptpc[5883] looking for IP info in /var/run/pptp/eth1#REF_RIRiDatVxB
2012:03:10-00:48:34 asg pppoa-sh: pptpc[5883] /var/run/pptp/eth1#REF_RIRiDatVxB not found, check ip-up script
2012:03:10-00:48:34 asg pppoa-sh: pptpc[5883] shutting down pptp connection 10.0.0.138
2012:03:10-00:48:39 asg pppoa-sh: pptpc[5883] removing UNIX domain socket /var/run/pptp/10.0.0.138
2012:03:10-00:48:39 asg pppoa-sh: pptpc[5883] verifying running processes
2012:03:10-00:48:39 asg pppoa-sh: pptpc[5883] pppd: : call REF_RIRiDatVxB ipparam eth1#REF_RIRiDatVxB failed
2012:03:10-00:48:39 asg pppoa-sh: pptpc[5883] pptp: call manager or gre-gateway failed
2012:03:10-00:48:39 asg pppoa-sh: pptpc[5883] one or more processes missing
2012:03:10-00:48:39 asg pppoa-sh: pptpc[5883] shutting down pptp connection 10.0.0.138
2012:03:10-00:48:43 asg pppoa-sh: pptpc[5883] removing UNIX domain socket /var/run/pptp/10.0.0.138
2012:03:10-00:48:43 asg pppoa-sh: pptpc[5883] encountered 2 errors so far
2012:03:10-00:48:43 asg pppoa-sh: pptpc[5883] connection terminated after 15 sec
2012:03:10-00:48:43 asg pppoa-sh: pptpc[5883] connection terminated prematurely
2012:03:10-00:48:43 asg pppoa-sh: pptpc[5883] restarting connection in 5 sec
2012:03:10-00:48:43 asg pppoa-sh: pptpc[5883] 2/3 critical error threshold
Fred