NvFBCDX9NvEnc: crash in Cleanup

Hello.
When running then NVIDIA Capture SDK(Ver 6.0) Sample NvFBCDX9NvEnc, It will crash in function Cleanup. The crash stack as below

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 20640.0x9974]
0x042c92a9 in QueryOglResource () from C:\Windows\SysWOW64\nvd3dum.dll
(gdb) bt
#0  0x042c92a9 in QueryOglResource () from C:\Windows\SysWOW64\nvd3dum.dll
#1  0x042c6129 in QueryOglResource () from C:\Windows\SysWOW64\nvd3dum.dll
#2  0x042cf5d5 in QueryOglResource () from C:\Windows\SysWOW64\nvd3dum.dll
#3  0x042c45ed in QueryOglResource () from C:\Windows\SysWOW64\nvd3dum.dll
#4  0x04219d3b in ?? () from C:\Windows\SysWOW64\nvd3dum.dll
#5  0x0419f587 in ?? () from C:\Windows\SysWOW64\nvd3dum.dll
#6  0x0423da6a in QueryOglResource () from C:\Windows\SysWOW64\nvd3dum.dll
#7  0x6a8221de in d3d9!Direct3DCreate9Ex () from C:\Windows\system32\d3d9.dll
#8  0x6a819c45 in d3d9!Direct3DCreate9Ex () from C:\Windows\system32\d3d9.dll
#9  0x6a822141 in d3d9!Direct3DCreate9Ex () from C:\Windows\system32\d3d9.dll
#10 0x6a822040 in d3d9!Direct3DCreate9Ex () from C:\Windows\system32\d3d9.dll
#11 0x6a821f47 in d3d9!Direct3DCreate9Ex () from C:\Windows\system32\d3d9.dll
#12 0x6a821e3f in d3d9!Direct3DCreate9Ex () from C:\Windows\system32\d3d9.dll
#13 0x6a821e26 in d3d9!Direct3DCreate9Ex () from C:\Windows\system32\d3d9.dll
#14 0x00403dbd in Cleanup ()

By trace source code, it crash on code g_pD3D9Device->Release();
After tracing code line by line, It found that the crash maybe caused by NvFBCDX9->NvFBCToDx9VidSetUp. But , the Cleanup had call NvFBCDX9->NvFBCToDx9VidRelease();

Have any SOME OBJ RELEASE need call?