in most cases, VPN error 721 is GRE issue. To troubleshooting it, use
PPTPclnt and PPTPsrv tool. This link may help.

VPN troubleshooting tools
VPN Troubleshooting Tools. 1. PPTPclnt and PPTPsrv to test GRE and
PPTP ... 11. Troubleshooting IPSec Tools. Related Topics. Troubleshooting
VPN ...
www.chicagotech.net/vpnissues/vpntools.htm


--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
"RogerF" <rfrench5@gmail.com> wrote in message
news:46fec053-edd0-4908-8088-9cea386c8d76@2g2000hsn.googlegroups.com...
Yes the error code is 721...


On Jul 1, 12:56 pm, "Robert L. \(MS-MVP\)" <findem...@chicagotech.net>
wrote:
> What's the error code? 721?
>
> --
> Bob Lin, MS-MVP, MCSE & CNE
> Networking, Internet, Routing, VPN Troubleshooting
> onhttp://www.ChicagoTech.net
> How to Setup Windows, Network, VPN & Remote Access
> onhttp://www.HowToNetworking.com"RogerF" <rfren...@gmail.com> wrote in
> message
>
> news:370fea1e-7bf3-4f1a-81fb-bd6010a05b08@34g2000hsf.googlegroups.com...
>
>
>
> > I'm on WinXP, am using the WinXP connection to pptp to another
> > network. It has been working fine. Now when trying to connect, all i
> > get is the message "Verifying username and password", and it just
> > hangs for about a minute, then another message comes up saying it
> > could not connect to the remote computer. I have tried reentering the
> > userid and password and rebooting, etc. and still it does not work. I
> > have contacted the remove source's administrator and they can't see
> > anything on their side, and they have confirmed the userid and
> > password are ok.
>
> > I *am* successfull in using it under WIndows Vista.
>
> > Is there any other free pptp vpn client I can use under a WInXP
> > platform??
>
> > THanks in advance,
> > Roger- Hide quoted text -
>
> - Show quoted text -