Problem disconnecting in cisco 1720

Hello,

I have been facing a problem of being disconnected whenever I connect
through cisco 1720 in a VPN setup. The username and password is valid and it
authenticated well when the username and password is used to connect to the
internet with a standalone PC but whenever the same username and password is
used through cisco 1720 then it gets disconnected after 15 seconds.

After diagnosing I found out that the Internet Service Provider (ISP) has a
RAS with v.32 module in it. But the modem connected to cisco 1720 has v.90
module. So it is really the problem with v.32 and v.90 (A speed problem). I
have tried turning off the v.90 in the script of cisco 1720 but that did not
work as well. I have tried changing the IOS several times but that did not
work as well.

So it there any solution to that. What is the problem with the
disconnecting? Please help!!!!

Thanks in advance

Siris

________________________________________________
Message sent using enet Mail