BASH completion problem

[arnuld]

i use Arch GNU/Linux and BASH is my login shell. i have also installed
"bash_completion" package but sometimes BASH tab-completion works and
sometimes not. most of the times the BASH tab-completion doe snot work
and just throws the frustrating beep on me (form my cabinet). at the
same time ZSH has no problems with tab-completion

what can be the problem ?

this is some output from my terminal:

[arnuld@arch ~] $ shopt
cdable_vars     off
cdspell         off
checkhash       off
checkwinsize    off
cmdhist         on
dotglob         off
execfail        off
expand_aliases  on
extdebug        off
extglob         on
extquote        on
failglob        off
force_fignore   on
gnu_errfmt      off
histappend      off
histreedit      off
histverify      off
hostcomplete    off
huponexit       off
interactive_comments    on
lithist         off
login_shell     on
mailwarn        off
no_empty_cmd_completion off
nocaseglob      off
nocasematch     off
nullglob        off
progcomp        on
promptvars      on
restricted_shell        off
shift_verbose   off
sourcepath      on
xpg_echo        off
[arnuld@arch ~] $ set -o
allexport       off
braceexpand     on
emacs           on
errexit         off
errtrace        off
functrace       off
hashall         on
histexpand      on
history         on
ignoreeof       off
interactive-comments    on
keyword         off
monitor         on
noclobber       off
noexec          off
noglob          off
nolog           off
notify          off
nounset         off
onecmd          off
physical        off
pipefail        off
posix           off
privileged      off
verbose         off
vi              off
xtrace          off
[arnuld@arch ~] $



[NOTE: i deduce the fact that BASH is my login shell because BASH
reads customisations i made from "~/.bash_profile" but not from
"~/.bashrc". also i see in "chsh" BASH as my login shell]


-- 
http://arnuld.blogspot.com/