Most Linux distributions do deposit a kernel configuration file along with the kernel. If none of these helps, you may wish to consider trying to use a kernel version which is closer to the module. Otherwise, try the mailing list at Linmodems.org for help. I get a kernel panic on closing the connection or unloading the driver. Configure the module so that it stays in the kernel, i.e. so that it is not unloaded.
Nothing seems to work.
Double-check that the modem you have is actually supported by the module you have. Try to determine at which stage of the installation process things break down. Check the man pages on the commands used in that stage and see if you can determine the source of the problem.