Hello guys, this is my first day using linux xubuntu.

I need to install usb 2.0 fax modem (external 56K V.92/V.90), but I can not manage to get it done.
The thing is, I downloaded the newest driver (dgcmodem_1.13) and when I double click on the .deb file, the ubuntu software center poped up and I pressed Install button.
But, the installation takes forever, it has been installing it for 1 hour (it displays the message "applying changes") and I had to restart the computer.
Later on, software center says that dgcmodem is installed, but efax-gtk does not work

When I try to install it through that weird terminal, and when I enter "dgcconfig" in terminal there are some permission issues and installation can not be finished.

Can someone assist me on this?
Thank you.

I somehow managed to get to this part:

When I enter dgcconfig in terminal, when the installation should finish I get this error:

ERROR: Module build failed!
Please examine the log file "/tmp/dgcconfig-buildlog.txt" to determine why.
root@asaosig-desktop:/home/asa-osig/dgcmodem-1.13#


and here is the text of that build log file:

(cd /lib/modules/3.5.0-44-generic/build && make "CNXT_KERNELSRC=/lib/modules/3.5.0-44-generic/build" "M=/usr/lib/dgcmodem/modules" "CC=gcc" clean)
make[1]: Entering directory `/usr/src/linux-headers-3.5.0-44-generic'
make[1]: Leaving directory `/usr/src/linux-headers-3.5.0-44-generic'
rm -rf *.o GPL/*.o *.ko GPL/*.ko *.mod.c GPL/*.mod.c .*.cmd GPL/.*.cmd .tmp_versions .tmp_versions /lib/modules/3.5.0-44-generic/build/.tmp_versions/dgcusbdcp.mod Modules.symvers GPL/hda/Modules.symvers Module.symvers GPL/hda/Module.symvers modules.order GPL/hda/modules.order Module.markers GPL/hda/Module.markers
(cd /lib/modules/3.5.0-44-generic/build && make "CNXT_KERNELSRC=/lib/modules/3.5.0-44-generic/build" "M=/usr/lib/dgcmodem/modules" "CC=gcc" modules)
make[1]: Entering directory `/usr/src/linux-headers-3.5.0-44-generic'
CC [M] /usr/lib/dgcmodem/modules/mod_dgcusbdcp.o
In file included from /usr/lib/dgcmodem/modules/mod_dgcusbdcp.c:57:0:
/usr/lib/dgcmodem/modules/GPL/oscompat.h:125:24: fatal error: asm/system.h: No such file or directory
compilation terminated.
make[2]: *** [/usr/lib/dgcmodem/modules/mod_dgcusbdcp.o] Error 1
make[1]: *** [_module_/usr/lib/dgcmodem/modules] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-3.5.0-44-generic'
make: *** [all] Error 2