Access denied while setting CTL name

From: Subir (Subir_at_discussions.microsoft.com)
Date: 01/22/05 

Date: Fri, 21 Jan 2005 15:29:02 -0800

Hi,
I am trying to change the friendly name of a CTL using Crypto API. However
the call to CertSetCTLContextProperty returns 2147942405 i.e. Access is
denied..
Am I missing something simple?

Thanks,
Subir

Code:
    //open the store
    hCTLStore = CertOpenSystemStore(NULL, TEXT("CA"));

    pCTLContext = CertEnumCTLsInStore(hCTLStore, NULL);
    while(NULL != pCTLContext)
    {
        if(CertGetCTLContextProperty(pCTLContext,
CERT_FRIENDLY_NAME_PROP_ID, (LPVOID) pbId, &cbId))
                {
            //re-initialize the array each time we are working with a new ctl
            szName[0] = TEXT('\0');
            //read each character from the BYTE array into a string.
            //TODO: find a better way to do the same.
            for(DWORD i = 0; i < cbId; i++)
            {
                hr = StringCchPrintf(szTemp, ARRAYSIZE(szTemp), TEXT("%c"),
(unsigned char)pbId[i]);
                if (SUCCEEDED(hr))
                {
                    hr = StringCchCat(szName, ARRAYSIZE(szName), szTemp);
                }
            }

                        //if(0 == _tcscmp(szName, _T("TestCTL")))
                        {
                                TCHAR* friendlyName = new TCHAR[_tcslen(_T("NewCTLName"))+1];
                                _tcscpy(friendlyName, _T("NewCTLName"));
                                CRYPT_DATA_BLOB data;
                                data.cbData = (_tcslen(friendlyName)+1) * sizeof(TCHAR);
                                data.pbData = (BYTE*)friendlyName;
                                error = GetLastError();
                                BOOL returnValue =
                                        CertSetCTLContextProperty(pCTLContext, CERT_FRIENDLY_NAME_PROP_ID, 0 ,
(void*)&data);
                                if(!returnValue)
                                {
                                        error = GetLastError();
                                }
                                        //break;
                        }
            //else
                        {
                                //move to the next ctl
                                pCTLContext = CertEnumCTLsInStore(hCTLStore, pCTLContext);
                        }
        }
    }