dial-up serial modem help?

Trying to set up my dial-up connection with a serial 56k DiamondSupra Express modem. I have used this modem successfully in Ubuntu, Xandros, Mepis, Puppy.. I'm not exactly a Newbie, but I'm no expert either and certainly no programmer at all. I am using the Knoppix 4.0 DVD.

Knoppix correctly detects my modem and when I try to connect to the inter-
net, it goes through the proper motions: I hear the modem squeal and see all the lights on it go on. Fine. The K dialer says "Connecting to My ISP Name", as it should. But then, after a very long pause, an error window opens and says "Time out expired while waiting for PPP interface to come
up." A log-in script debug window shows the following:

ATZ
OK
ATM1L1
OK
ATDT455 1869
CONNECT 57600

A modem query returns:
ATI 56000
AT1 255
AT2
AT3 SupraExpress 56 pro V.92
AT4 11151012000 r3000111170000000
AT5 B4
AT6 B4 UK 00
AT7 56DPF - PLL L8571A Rev 30.03/34.00

I would really love to go online with Knoppix; if I could do that, I would give serious thought to a permanent installation of some kind.
Any helpful comments will be greatly appreciated. Thanks.

Wow! Great response guys! I guess there's a little Microsoft in Knoppix too! Never mind. I'll get the answer some other way; I won't disturb your little boy's club again.

Hi:

I had similar Problem with the same modem, I used pppconfig and use pon and poff for connecting, it works. Try it.

AJ

Lin-X won't try it, apparantly whoever it is lacks the patience and understanding required to use a forum