With help from linmodems.org and this discussion group (many thanks), I have got my Ubuntu 10.4 system talking to my Zoom 3095 usb modem, but after dialling and initial recognition, a ppp problem prevents completion of the ISP link. The wvdial log says "Unable to run /usr/sbin/pppd" (although pppd is definitely at that location), followed by "Check permissions or specify a PPPD Path option in wvdial.conf" Here's my wvdial.conf : [Dialer Defaults] Init1 = ATZ Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Modem Type = USB Modem ISDN = 0 New PPPD = yes Phone = 08456600924 Modem = /dev/ttyACM0 Username = (correct username shown) Carrier Check = no Password = (correct password shown) Baud = 460800 Do I need to make changes here, or elsewhere, to get things working? Thanks, Ray