I have the same modem usr5637 & am trying to set it up for a non-literate friend on an Eeepc 900 running Intrepid. I want it to use Gnome-PPP as the GUI for simplicity.
Have managed to get it to connect by running sudo wvdial in a terminal. Have had Firefox working by turning off networking & choosing Online mode in Firefox.
Won't dial unless I run as root. Get this message:
I have done:Unable to run /usr/sbin/pppd.
--> Check permissions, or specify a "PPPD Path" option in wvdial.conf
& also:sudo chown root:dip /usr/sbin/pppd
sudo chmod 4754 /usr/sbin/pppd
sudo chmod 777 /etc/ppp/pap-secrets
sudo chmod 777 /etc/ppp/peers
Any help greatly appreciated!sudo ln -s /dev/modem /dev/ttyACM0