How to find a client key for NVENC 3.0?

I’ve download CUDA 5.0 and NVENC sdk 3.0 on my PC(Driver ver 331.82)

Following is the sample code:
/FAKE KEY**********/
static const GUID NV_CLIENT_KEY_TEST = { 0x0, 0x0, 0x0, { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } };

HRESULT CNvEncoder::OpenEncodeSession(int argc, const char *argv,unsigned int deviceID)
{
GUID clientKey = NV_CLIENT_KEY_TEST;
NV_ENC_OPEN_ENCODE_SESSION_EX_PARAMS stEncodeSessionParams = {0};

.....
stEncodeSessionParams.clientKeyPtr = &clientKey;
nvStatus = m_pEncodeAPI->nvEncOpenEncodeSessionEx(&stEncodeSessionParams, &m_hEncoder);

if (nvStatus != NV_ENC_SUCCESS) 
{
    printf("File: %s, Line: %d, nvEncOpenEncodeSessionEx() returned with error %d\n", __FILE__, __LINE__, nvStatus);
    printf("Note: GUID key may be invalid or incorrect.  Recommend to upgrade your drivers and obtain a new key\n");
    checkNVENCErrors(nvStatus);
}

....

Now I’v got NV_ENC_ERR_INCOMPATIBLE_CLIENT_KEY for the function return value.
My question is: How can I find someone to contact with this problem from NVIDIA coperation in China to resolve this problem?

A key available is also OK, my email is yuanqs@xcyg.net
Thanks!

I got the same problem. Do you fix it?