Connection Manage not work

Hi dialog :
I was use the Connection Manager and when I click the button"boot test mode",there is a window show :

"unhandled exception has occurred in your application,if you click continue .the application will ignore this error and attempt to continue .if you click quit ,the application will close immediately . unable to load DLL"hci_lib.dll ":The specified module could not be found. [Exception from HRESULT:0x8007007E] "

I have check the "hci_lib.dll" is also in the installation folder. Can you help me ?