Can't dial-up with GNOME-PPP on ubuntu 9.04

I downloaded and installed Gnome-ppp from the web using Ubuntu 8.10, and a modem driver for usb 56k dial up modems from Linuxant. My modem is a Zoom 3095, series 1063:

Here is what happens:

--> Ignoring malformed input line: ";Do NOT edit this file by hand!"
--> WvDial: Internet dialer version 1.60
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Modem initialized.
--> Sending: ATM1L3DT*70,,4901941
--> Waiting for carrier.
ATM1L3DT*70,,4901941
CONNECT 57600
--> Carrier detected. Waiting for prompt.
** O1 Communications TermServ **
Login:
--> Looks like a login prompt.
--> Sending: jkohler2
jkohler2
Password:
--> Looks like a password prompt.
--> Sending: (password)
    Entering PPP Session.
    IP address is 69.19.240.134
    MTU is 1524.
--> Looks like a welcome message.
--> Starting pppd at Tue Apr 28 20:14:34 2009
--> Warning: Could not modify /etc/ppp/pap-secrets: Permission denied
--> --> PAP (Password Authentication Protocol) may be flaky.
--> Warning: Could not modify /etc/ppp/chap-secrets: Permission denied
--> --> CHAP (Challenge Handshake) may be flaky.
--> Pid of pppd: 5398
--> Using interface ppp0
--> local IP address 69.19.240.134
--> remote IP address 69.19.217.75
--> primary DNS address 66.81.1.250
--> secondary DNS address 66.81.1.252
--> Terminating connection due to lack of activity.
--> Connect time 0.1 minutes.
--> Disconnecting at Tue Apr 28 20:14:40 2009
--> The PPP daemon has died: Link idle: Idle Seconds reached. (exit code = 12)
--> man pppd explains pppd error codes in more detail.
--> I guess that's it for now, exiting
--> The PPP daemon has died. (exit code = 12)

Thanks in advance for any help!

John