Question of keyboard input after lanuch vlc

[PstreeM China]

hello all :

  yestoday i install the vlc media player use ports ,  the question is that
:

After i lanuch vlc (In a X Env , just test  Openbox and xfce ),   i can not
input any word ,look like keyboard is faile , mouse are normal ,  then i
kill (click the X) it , the keyboard is normal.

test that , lanuch vlc , when the CAPSLOCK is on , i can input any word
(ADKXKOPI and so on ) .. and still can not input word when CAPSLOCK is off.

 can someone give me help for fix this Question  ??  thanks all !

Best Regards.