diagnose fcitx problem

[Teng Zhang]

hello, i have installed fcitx , the output of ps indicates that it's
running as a daemon, but i can't use the specified combination key to
activate it. I don't know what's happening. What i wonder is that is there
a tool to diagnose the fcitx on debian or is there a proper way to diagnose
it manually.(I have seen the fcitx FAQ, but i can't fully understand it.And
also, the Alt/Meta key works well in emacs. )