The only other thing I can think of is you rebooted, when you didn't need to. Therefore you might need to start the cam again.
or you are not saving that newcamd.list file not as plain text.
Other than that I give up... we have exhausted all options which included.
making sure your tuner cables are in the correct ports.
making sure tuners are configured correctly and disable tuner b if you only have 1 line
your line is working as its been tested
your 2 files, both newcamd.list and mg_cfg have been correctly ftp'd over to /usr/keys and to /etc
your abm should be set up correctly and your area set to Custom. (hopefully you are not just scanning free to air channels in abm settings...or I will kill you)
your cam has been set to mgcamd and started.
Not a lot else to do.