help me about language-pack-en

[ning luwen]

Hi all,
  the ubuntu version is ubuntu 10.10, here is the problem.


sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run `apt-get -f install' to correct these.
The following packages have unmet dependencies:
  language-pack-en: Depends: language-pack-en-base (>=
1:10.10+20100703) but it is not installed
E: Unmet dependencies. Try using -f.



sudo apt-get -f install
Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  language-pack-en language-pack-en-base
The following NEW packages will be installed:
  language-pack-en-base
The following packages will be upgraded:
  language-pack-en
1 upgraded, 1 newly installed, 0 to remove and 107 not upgraded.
1 not fully installed or removed.
Need to get 0B/997kB of archives.
After this operation, 4751kB of additional disk space will be used.
Do you want to continue [Y/n]? y
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LANG = "en_US.utf8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
dpkg: error processing language-pack-en (--remove):
 Package is in a very bad inconsistent state - you should
 reinstall it before attempting a removal.
Errors were encountered while processing:
 language-pack-en
E: Sub-process /usr/bin/dpkg returned an error code (1)


sudo apt-get install language-pack-en --reinstall
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
  language-pack-en: Depends: language-pack-en-base (>=
1:10.10+20100727) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or
specify a solution).


what should I do?