Comment 31 for bug 61827

Hi All,

I have got error Authentication failure after
make install:

vic@vic-m7440:~/Desktop/fsam7440-0.4$ make
make -C /lib/modules/2.6.28-11-generic/build SUBDIRS=/home/vic/Desktop/fsam7440-0.4 modules
make[1]: Entering directory `/usr/src/linux-headers-2.6.28-11-generic'
  CC [M] /home/vic/Desktop/fsam7440-0.4/fsam7440.o
  Building modules, stage 2.
  MODPOST 1 modules
  CC /home/vic/Desktop/fsam7440-0.4/fsam7440.mod.o
  LD [M] /home/vic/Desktop/fsam7440-0.4/fsam7440.ko
make[1]: Leaving directory `/usr/src/linux-headers-2.6.28-11-generic'
vic@vic-m7440:~/Desktop/fsam7440-0.4$ make install
su -c "install -d /lib/modules/2.6.28-11-generic/kernel/net/wireless/ && install -m 644 -c fsam7440.ko /lib/modules/2.6.28-11-generic/kernel/net/wireless/ && /sbin/depmod -a"
Password:
su: Authentication failure
make: *** [install] Error 1

I have typed my password as first Ubuntu User. I am only on Ubuntu just few days. Could anybody give me a clue, please?
Thanks in advance.