linux sdk problem？

i refer http://software.intel.com/en-us/forums/topic/479998

i have error

code：

......

        sts = mfxSession.Init(impl, &ver);
        LOG_INFO("line:%d,sts:%d",__LINE__,sts );
        /* create va display */
        int fd = open("/dev/dri/card0", O_RDWR);
        LOG_INFO(" open fd:%d", fd);
        VADisplay va_dpy = vaGetDisplayDRM(fd);
        int maj_ver, min_ver;
        vaInitialize(va_dpy, &maj_ver, &min_ver);

        //Provide VA display handle to Media SDK
        mfxSession.SetHandle(static_cast < mfxHandleType >
        (MFX_HANDLE_VA_DISPLAY), va_dpy);

        pmfxDEC = new MFXVideoDECODE(mfxSession);

......

libva info: VA-API version 0.34.0
open lib: Invalid argument
libva info: va_getDriverName() returns 1
Segmentation fault (core dumped)

i don't known how solve ?

i'm english very poor.