arrow keys don't move cursor but output ABCD in INSERT mode

 hi guys,

last weekend I finally did the switch from .vim to vim-addon-manager. after the change, I made some small tests, almost everything looks fine. but the arrow key don't move cursor in INsert mode any longer, just ouput A, B, C, and D. I remembered that could be the vi-compatible problem. So I added 

set nocp 

in my .vimrc. unfortunately, this didn't help.  I open a file, try :set cp ? , "nocompatible" was returned.

In gvim, arrow keys work fine, the problem happens only with vim in terminal.

Do you guys have any idea, where is the problem? please give me a hint, thank you!

here I list some infos of my system and vim/vim plugins installed

system: archlinux

vim: VIM - Vi IMproved 7.3 (2010 Aug 15, compiled May 25 2011 22:06:37)

plugins:

set runtimepath+=~/vim-addons/vim-addon-manager

let s:addon_list=[]

call add(s:addon_list,'desert')

call add(s:addon_list,'desert256')

call add(s:addon_list,'darkerdesert')

call add(s:addon_list,'darkblue2')

call add(s:addon_list,'Indent_Guides')

call add(s:addon_list,'ack')

call add(s:addon_list,'Pydiction')

call add(s:addon_list,'xml')

call add(s:addon_list,'Align294')

call add(s:addon_list,'AutoClose1849')

call add(s:addon_list,'cecutil')

call add(s:addon_list,'DirDiff')

call add(s:addon_list,'DrawIt')

call add(s:addon_list,'FencView')

call add(s:addon_list,'Gundo')

call add(s:addon_list,'matchit.zip')

call add(s:addon_list,'mru')

call add(s:addon_list,'neocomplcache')

call add(s:addon_list,'The_NERD_tree')

call add(s:addon_list,'The_NERD_Commenter')

call add(s:addon_list,'repeat')

call add(s:addon_list,'snipmate')

call add(s:addon_list,'snipmate-snippets')

call add(s:addon_list,'supertab')

call add(s:addon_list,'surround')

call add(s:addon_list,'taglist')

call vam#ActivateAddons(s:addon_list)

Kent

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