Since when using BQQ webcam, Citrix camera always keeps redirection. But Citrix webcam can’t be opened, which leads to BQQ2010 unable be used. By solving this problem, by sever conducts regsvr32 “C:\Program Files\Citrix\ICA Service \CtxDSEndpoints.dll”-u. If need to use Citrix webcam redirection again, to run regsvr32”C;\Program Files \Citrix\ICAService\CtxDSEndpoints.dll”