help, the ibus input candidate list is far away from input window

["宾" <liangtb@xxxxxx>]

hi, when I use geany and firefox, the input candidate list is away from input window (not following the cursor, but at the bottom left corner), how can I solve this problem?
I use ibus-rime, xfce.
any help will be appreciated. 
thank you

please visit this link for screen shot
http://pan.baidu.com/s/1dDGgHB7‍;