Modem not detected by wvdial.conf file on ubuntu 10.04
 

I want to connect my Airtel mobile broadband internet on my Ubuntu 10.04 desktop via bluetooth connection.
I am able to make a bluetooth connection between ubuntu and mobile and have created DUN using bluetooth manager.
Now, as I run the command wvdialconf /etc/wvdial.conf , output says my modem is not detected.
I ran the command lsusb
there it is indeed showing my vendor_Id etc for my modem mentioning that it is a bluetooth connection.
I tried my manually editing the file wvdial.conf using the command gedit wcdial.conf
I pasted there :

[Dialer Defaults]
Init3 = AT+CGDCONT=1,”IP”,”airtelgprs.com”,<cr>
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Modem Type = USB Modem
ISDN = 0
New PPPD = yes
Phone = *99***1#
Modem = /dev/ttyACM0
Username = ” “
Password = ” “
Baud = 460800

and now as I ran the command wvdial
output says my modem was not detected

I am using LAVA handset with an Airtel GSM Sim to establish the internet connection
I am able to make internet connection on Windows7 using the same, but here on ubuntu 10.04 my Modem is not getting detected by the wvdial.conf file

Please help!!

any help would be highly appreciated